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Franco D. Albareti
Instituto de Física Teórica UAM/CSIC
28th September 2015
PhD student
under the supervision of
Prof. Francisco Prada and Prof. Antonio L. Maroto
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Franco D. Albareti
28th September 2015
PhD student
under the supervision of
Prof. Francisco Prada and Prof. Antonio L. Maroto
Acknowledgements
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Franco D. Albareti
28th September 2015
Work in collaboration with
Johan Comparat (IFT-UAM/CSIC), Carlos M. Gutiérrez (IAC),
Isabelle Pâris (Trieste Obs.), David Schlegel (LBNL),
Martín López-Corredoira (IAC), Donald P. Schneider (Penn. U),
…
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Fine structure constant?
Introduction
Strength of coupling between
the electromagnetic field/vector bosons and matter.
Fundamental constant of Nature
Does it change with cosmic time?Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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How?
Introduction
[OIII] doublet
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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How?
Introduction
[OIII] doublet
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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How?
Introduction
[OIII] doublet
Forbidden lines Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Where?
Introduction
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Where?
Introduction
Cat’s Eye Planetary
NebulaFranco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Where?
Introduction
Two new lines discovered by
Huggins 1864
In 1927,
Bowen showed that
they are due to [OIII]
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Introduction
Where?
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Introduction
Where?
[OIII] on quasar spectra
Cosmological probesFranco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Introduction
Where?
We need lots of them!
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Current constraints based on the [OIII] doublet method
Introduction
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Current constraints based on the [OIII] doublet method
Introduction
2
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Current constraints based on the [OIII] doublet method
Introduction
2
Sloan Digital Sky Survey
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Same width
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Same width
Amplitude ratio ~ 3
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
Methodology
Redshift independent
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Measurement method
[OIII] doublet
Methodology
Redshift independent
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Sample selectionsdss.org
Sloan Digital Sky Survey
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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4 surveys
Sample selection
SDSS-III
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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4 surveys
APOGEE(Milky way structure:
composition)
MARVELS(Exoplanets)
SEGUE-II(Milky way structure:
kinematics)
Sample selection
SDSS-III
BOSS
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Explore our
neighborhood
APOGEE(Milky way structure:
composition)
BOSS
MARVELS(Exoplanets)
Sample selection
SDSS-III
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
SEGUE-II(Milky way structure:
kinematics)
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Cosmological
(really far away)
APOGEE(Milky way structure:
composition)
BOSS
MARVELS(Exoplanets)
Sample selection
SDSS-III
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
SEGUE-II(Milky way structure:
kinematics)
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BOSS
Sample selection
SDSS-III
Baryonic Oscillation
Spectroscopic Survey
BOSS spectrograph
Luminous Red Galaxies (LRGs)
&
Quasars
R ~ 2000
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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BOSS
Sample selection
SDSS-III
Baryonic Oscillation
Spectroscopic Survey
BOSS spectrograph
Luminous Red Galaxies (LRGs)
&
Quasars
R ~ 2000
SDSS-IV/eBOSS
(still further away)
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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BOSS
Sample selection
SDSS-III
Baryonic Oscillation
Spectroscopic Survey
BOSS spectrograph
Luminous Red Galaxies (LRGs)
&
Quasars
R ~ 2000
SDSS-IV/eBOSS
(still further away)~300,000
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Sample selection
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Quasars from SDSS-III/BOSS
~300,000
Sample selection
Wavelength
Red
shif
tFranco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Quasars from SDSS-III/BOSS
~300,000
Sample selection
HαHβ
MgII
CIII]
CIV
Lyα
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Quasars from SDSS-III/BOSS
~300,000
Sample selection
[OIII] 4960 5008 A
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Quasars from SDSS-III/BOSS
~300,000
Sample selection
[OIII] 4960 5008 Az < 1
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Sample selection
Quasars up to z = 1; >10,000 (clean)
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Sample selection
Quasars up to z = 1; >10,000 (clean)
S/N [OIII] > 10
Converging
Gaussian fits
Outliers > 4σ
Aceptance rate ~ 1/4
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Sample selection
Quasars up to z = 1; >10,000 (clean)
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Sample selection
Quasars up to z = 1; >10,000 (clean)
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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ResultsSystematics?
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Misidentification of the lines OK
Interval for the Gaussian fits OK
Hβ contamination OK
Continuum subtraction OK
Different fitting methods OK
ResultsSystematics?
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
![Page 54: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/54.jpg)
Spatial variation
Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
![Page 55: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/55.jpg)
Spatial variation
Results
OK
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Spatial variation
Dipole?
Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Spatial variation
No statistical
significance
Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Results[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 59: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/59.jpg)
Results[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Results[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Results
This work (2015)
[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 62: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/62.jpg)
Results
This work (2015)
[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 63: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/63.jpg)
IC 418 (spirograph nebula)
Results[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 64: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/64.jpg)
IC 418 (spirograph nebula)
Results[NeIII] lines
Small
[NeIII] line
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 65: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/65.jpg)
Results[NeIII] lines
Small
[NeIII] line
blended with Hε
and HeI
IC 418 (spirograph nebula)
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 66: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/66.jpg)
Results[NeIII] lines
Small
[NeIII] line
blended with Hε
and HeI
convolved spectrum
IC 418 (spirograph nebula)
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 67: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/67.jpg)
Results[NeIII] lines
Small
[NeIII] line
blended with Hε
and HeI
convolved spectrum
IC 418 (spirograph nebula)
OK
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 68: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/68.jpg)
Results[NeIII] lines
stacked SDSS spectra
[NeIII] lines
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
![Page 69: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/69.jpg)
Results[NeIII] lines
stacked SDSS spectra
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
[NeIII] lines
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Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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The precision is limited by the sky subtraction
ResultsSimulations
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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The precision is limited by the sky subtraction
ResultsSimulations
Typical
errors
from the
Gaussian
fitting
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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The precision is limited by the sky subtraction
ResultsSimulations
Errors
Typical
errors
from the
Gaussian
fitting
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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ResultsRedshift bins
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Results
Linear redshift dependence
Franco D. Albareti
28th September 2015
TAE 2015 Benasuqe
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Combining with quasars from DR7
SDSS spectrograph
Reanalizing the spectra
Results
[OIII] 4960 5008 A[OIII] 4960 5008 A
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Results
[OIII] 4960 5008 A[OIII] 4960 5008 AReobserved quasars
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Robust constraint for the variation of the fine structure
constant at z ~ 0.6 (5.7 Gyr ago) (more than 35 samples
analyzed).
For further details, “FDA, J. Comparat, F. Prada et al.,
MNRAS 452 (2015) 4153,
arXiv:1501.00560”
Results
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Outline
Introduction
Methodology
Sample selection
Results
APOGEE-QFranco D. Albareti
28th September 2015
TAE 2015 Benasque
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Franco D. Albareti
28th September 2015
TAE 2015 Benasque
![Page 82: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/82.jpg)
Collaborators: F.D. Albareti, J. Comparat, F. Prada, I. Pâris, A. Font, D. Schlegel,
J. Hennawi, J-P. Kneib, D.P. Schneider, A. Myers, W. Brandt, J.K Parejko, your name here…
40 targets, 12 visits 450 fiber hours
Pilot program 2015/16
Black hole mass
Redshifts
[OIII] APOGEE
MgII, CIV BOSS
???
Fine-structure constant
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Thanks!
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Backslides
Franco D. Albareti
28th September 2015
TAE 2015 Benasque
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Exact formula for the determination of the
variation of the fine structure constant
Franco D. Albareti
17th April 2015
12th MultiDark
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Fine structure constant?
Introduction
Energy levels
Relativity + Spin
Franco D. Albareti
17th April 2015
12th MultiDark
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How do we measure its variation?
Geological constraints
Local measurements
Astronomical tests
Introduction
Absorption z = 0.6-4
Emission z = 0.05-1.0
Oklo phenomenon z=0.15
Meteorites z=0.45
10 years
Franco D. Albareti
17th April 2015
12th MultiDark
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How do we measure its variation?
Absorption lines from quasars
(Many-multiplet method )
More precise
Several assumptions
Controversial
Introduction
Franco D. Albareti
17th April 2015
12th MultiDark
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How do we measure its variation?
Emission lines doublet from quasars
Less precise
Straight-forward
No assumptions
Fine structure of the emission lines
Introduction
Franco D. Albareti
17th April 2015
12th MultiDark
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Forbidden lines
Electric quadrupole
and magnetic dipole
transitions
Found in extremely
rarefied media
Introduction
Franco D. Albareti
17th April 2015
12th MultiDark
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Continuum fit: seven-order polynomial
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Continuum fit: seven-order polynomial
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Continuum fit: seven-order polynomial
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Find the lines SDSS Redshift
Three significant figures (error estimates )
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Find the lines SDSS Redshift
Three significant figures (error estimates )
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Measurement method
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
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Measurement method
Methodology
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 98: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/98.jpg)
Line positions
Methodology
Real pixels (with errors)
Gaussian fits
Expected line position
Error for ~ 10^-3,-4
[OIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
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Line positions
Methodology
Real pixels (with errors)
Gaussian fits
Expected line position
Error for ~ 10^-3,-4
[OIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 100: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/100.jpg)
Line positions
Methodology
Real pixels (with errors)
Gaussian fits
Expected line position
Error for ~ 10^-3,-4
[OIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 101: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/101.jpg)
Line positions
Methodology
[OIII] lines [NeIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
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Line positions
Methodology
[OIII] lines [NeIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
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Line positions
Methodology
[OIII] lines [NeIII] lines
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 104: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/104.jpg)
Line positions
Methodology
[OIII] lines [NeIII] lines
6th Balmer line
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 105: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/105.jpg)
Criteria
Redshift
Sample selection
~300,000
~45,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 106: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/106.jpg)
Criteria
Redshift
Noise
Sample selection
~300,000
~45,000
~13,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 107: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/107.jpg)
Criteria
Redshift
Noise
Sample selection
~300,000
~45,000
~13,000
Low redshift
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 108: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/108.jpg)
Criteria
Redshift
Noise
Sample selection
~300,000
~45,000
~13,000
Low redshift
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 109: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/109.jpg)
Criteria
Redshift
Noise
Sample selection
~300,000
~45,000
~13,000
Low redshift
High redshift
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 110: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/110.jpg)
Criteria
Redshift
Noise
Sample selection
~300,000
~45,000
~13,000
High redshift
Low redshift
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 111: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/111.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
~300,000
~45,000
~13,000
~12,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 112: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/112.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 113: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/113.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 114: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/114.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 115: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/115.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
4%
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 116: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/116.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
Mild constraints
4%
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 117: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/117.jpg)
Sample selection
Criteria
Redshift
Noise
Non-converging Gaussian fits
Outlier points
~300,000
~45,000
~13,000
~12,000
~11,000
Mild constraints
4%
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 118: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/118.jpg)
Misidentification of the lines?
Results
Same width
Amplitude ratio ~ 3
Systematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 119: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/119.jpg)
Misidentification of the lines OK
Results
Same width
Amplitude ratio ~ 3
Systematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 120: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/120.jpg)
Misidentification of the lines OK
Interval for the Gaussian fit?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 121: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/121.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 122: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/122.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
Hβ contamination?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 123: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/123.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
Hβ contamination OK
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 124: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/124.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
Hβ contamination OK
Continuum subtraction?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 125: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/125.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
Hβ contamination OK
Continuum subtraction OK
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 126: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/126.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits? mmm…
Hβ contamination OK
Continuum subtraction OK
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 127: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/127.jpg)
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 128: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/128.jpg)
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 129: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/129.jpg)
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 130: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/130.jpg)
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 131: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/131.jpg)
Different fitting methods?
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 132: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/132.jpg)
Different fitting methods
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 133: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/133.jpg)
Different fitting methods
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 134: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/134.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits mmm…
Hβ contamination OK
Continuum subtraction OK
Different fitting methods OK
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 135: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/135.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hβ contamination OK
Continuum subtraction OK
Different fitting methods OK
ResultsSystematics?
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 136: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/136.jpg)
Misidentification of the lines
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 137: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/137.jpg)
Misidentification of the lines
Systematics
Same width
Amplitude ratio ~ 3
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 138: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/138.jpg)
Misidentification of the lines
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 139: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/139.jpg)
Misidentification of the lines
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 140: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/140.jpg)
Misidentification of the lines
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 141: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/141.jpg)
Misidentification of the lines
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 142: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/142.jpg)
Misidentification of the lines
Systematics
OK
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 143: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/143.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 144: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/144.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 145: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/145.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 146: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/146.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 147: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/147.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
More affected by noise and Hbeta
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 148: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/148.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
More affected by noise and Hbeta
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 149: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/149.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits
Systematics
More affected by noise and Hbeta
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 150: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/150.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 151: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/151.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 152: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/152.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 153: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/153.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 154: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/154.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 155: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/155.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 156: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/156.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 157: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/157.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 158: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/158.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination
Systematics
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 159: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/159.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 160: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/160.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 161: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/161.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 162: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/162.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction
Systematics
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 163: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/163.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction OK
Different methods
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 164: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/164.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction OK
Different methods
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 165: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/165.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction OK
Different methods
Systematics
OK
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 166: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/166.jpg)
Misidentification of the lines OK
Interval for the Gaussian fits OK
Hbeta contamination OK
Continuum subtraction OK
Different methods OK
And more…(simulations)
Systematics
“F. D. Albareti et al., arXiv: 1501.00560”
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 167: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/167.jpg)
Final results
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 168: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/168.jpg)
Final results
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 169: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/169.jpg)
Final results
A factor 2.5 of improvement is expected…?
Systematics
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 170: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/170.jpg)
Robust constraint for the variation of the fine structure
constant at z ~ 0.6 (5.7 Gyr ago) (more than 35 samples
analyzed).
For further details,
Well…, it is not a big improvement…
“FDA, J. Comparat, F. Prada et al.,
arXiv:1501.00560”
Results
mmm…
why?
Franco D. Albareti
17th April 2015
12th MultiDark
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Errors
Results
Franco D. Albareti
17th April 2015
12th MultiDark
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Errors
Standard deviation
Results
Franco D. Albareti
17th April 2015
12th MultiDark
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Errors
Standard deviation
Sky
Results
Franco D. Albareti
17th April 2015
12th MultiDark
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Errors
Standard deviation
Sky
Results
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 175: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/175.jpg)
Atmospheric O2 airglow emission
Results
Franco D. Albareti
17th April 2015
12th MultiDark
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The precision is limited by the sky subtraction
Results
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 177: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/177.jpg)
VLT/UVES High-resolution spectrograph
Future projects
R ~ 62,000 – 110,000
z ~ 0.6
Franco D. Albareti
17th April 2015
12th MultiDark
< 10^-6
![Page 178: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/178.jpg)
VLT/UVES High-resolution spectrograph
Future projects
R ~ 62,000 – 110,000
z ~ 0.6
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 179: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/179.jpg)
Future projects
R ~ 62,000 – 110,000
z ~ 0.6
Proposal submitted…
Franco D. Albareti
17th April 2015
12th MultiDark
VLT/UVES High-resolution spectrograph
![Page 180: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/180.jpg)
VLT/UVES High-resolution spectrograph
NOT/FIES High-resolution spectrogpraph
Future projects
R ~ 62,000 – 110,000
z ~ 0.6
< 10^-6
Franco D. Albareti
17th April 2015
12th MultiDark
R ~ 62,000 – 110,000
z ~ 0.3
![Page 181: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/181.jpg)
R ~ 62,000 – 110,000
z ~ 0.6
R ~ 62,000 – 110,000
z ~ 0.3
VLT/UVES High-resolution spectrograph
NOT/FIES High-resolution spectrogpraph
Future projects
Franco D. Albareti
17th April 2015
12th MultiDark
Proposal
submitted….
![Page 182: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/182.jpg)
APOGEE-N Med-resolution spectrograph
Future projects
Franco D. Albareti
17th April 2015
12th MultiDark
R ~ 22,000
z ~ 2.2< 10^-5
APOGEE-Q
Ancillary Science
Proposal
For SDSS-IV/APOGEE-2
![Page 183: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/183.jpg)
APOGEE-N Med-resolution spectrograph
Future projects
Franco D. Albareti
17th April 2015
12th MultiDark
R ~ 22,000
z ~ 2.2< 10^-5
APOGEE-Q
Ancillary Science
Proposal
For SDSS-IV/APOGEE-2
![Page 184: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/184.jpg)
APOGEE-N Med-resolution spectrograph
Future projects
Franco D. Albareti
17th April 2015
12th MultiDark
R ~ 22,000
z ~ 2.2< 10^-5
APOGEE-Q
Ancillary Science
Proposal
For SDSS-IV/APOGEE-2
![Page 185: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/185.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 186: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/186.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 187: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/187.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 188: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/188.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 189: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/189.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 190: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/190.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 191: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/191.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 192: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/192.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark
![Page 193: Franco D. Albaretibenasque.org/2015tae/talks_contr/2811_Albareti.pdf · TAE 2015 Benasque. Sample selection. Quasars from SDSS-III/BOSS ~300,000 Sample selection Wavelength Redshift](https://reader035.vdocuments.us/reader035/viewer/2022071018/5fd224adad989348e17dd44a/html5/thumbnails/193.jpg)
Sample selection
Franco D. Albareti
17th April 2015
12th MultiDark