30/6/09 unity of the universe 1. michael drinkwater for the team australia: blake, brough, colless,...
TRANSCRIPT
![Page 1: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/1.jpg)
30/6/09Unity of the Universe1
![Page 2: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/2.jpg)
Michael Drinkwater for the team
Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek, Li, Pimbblet, Poole,
Pracy, Sharp, WisniosikiU.S.A.: Foster, Gladders, Madore,
Martin, Small, Wyder Canada: Gilbank, Woods, Yee
The WiggleZ Dark Energy Survey
30/6/092 Unity of the Universe
1. Motivation2. Design &
Progress3. Large Scale
Structure Results
4. Other Results
![Page 3: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/3.jpg)
1. Motivation
30/6/09Unity of the Universe3
Need to sample around redshift z=0.6 when acceleration starts
Survey aims:Measure BAO
scale to 2% in a sample of 240,000 galaxies at 0.3<z<0.9
Measure w to 10% to independently validate constant dark energy model
![Page 4: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/4.jpg)
Motivation
30/6/09Unity of the Universe4
![Page 5: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/5.jpg)
2. Design & Progress
30/6/09Unity of the Universe5
GALEX satellite imagingUV-selected galaxiesMedium Imaging Survey
extendedNUV < 22.8
Optical imaging: r < 22.5SDSS (North)RCS2 survey on CFHT
(South)AAT’s new AAOmega fibre
spectrograph220-night large projectMeasure 240,000 redshiftsStar forming galaxiesEmission line redshifts in
short 1-hour exposures
![Page 6: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/6.jpg)
Example spectra
30/6/09Unity of the Universe6
Quality = 5 (high)Redshift z=0.57R = 21.4 mag
Quality = 3 (acceptable)Redshift z=0.86R = 21.2 mag
![Page 7: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/7.jpg)
Survey coverage
30/6/09Unity of the Universe7
![Page 8: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/8.jpg)
Design Improvements
30/6/09Unity of the Universe8
New spectrograph beam splitterMoved spectra
100 nm to the red
More reliable redshifts
Optical Colour SelectionIncreased
median redshift to zmed=0.6
![Page 9: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/9.jpg)
Survey Status
30/6/09Unity of the Universe9
Progress Observations ¾ done Scheduled to run 2006 to 2010 August Over 140,000 galaxies measured Have doubled the number of known
z>0.5 galaxies from the two largest existing surveys (DEEP2 & VIMOS)
Galaxies in the 15-hour WiggleZ field… to 3.3 Gpc distance
![Page 10: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/10.jpg)
3. Large scale clustering results
30/6/09Unity of the Universe10
The 2dF control system…
![Page 11: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/11.jpg)
WiggleZ power spectrum
30/6/09Unity of the Universe11 By Chris Blake
5% accuracy indk = 0.01 bins
Linear model isgood fit to k = 0.3
![Page 12: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/12.jpg)
WiggleZ power spectrum
30/6/09Unity of the Universe12 By Chris Blake
Divided by reference model with BAO signal removed.
Model divided by reference
Model convolved with survey window
![Page 13: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/13.jpg)
Cosmological Parameters
30/6/09Unity of the Universe13 By Chris Blake
![Page 14: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/14.jpg)
Predicted final sensitivity
30/6/09Unity of the Universe14 By Tamara Davis
Predicted precision in measurement of (wconst, ΩM) combined with supernovae
![Page 15: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/15.jpg)
4. Other results
30/6/09Unity of the Universe15
Small scale clustering (Blake et al. 2009)UV luminosity function (Russell Jurek’s PhD)Growth of structure (Carlos Contreras’ PhD)Super starburst galaxies (Emily Wisnioski’s
PhD)Future work
Neutrino massGalaxy bispectrumGenus statisticHomogeneity scale of Universe (vs LTB
models)
![Page 16: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/16.jpg)
Small scale clustering
30/6/09Unity of the Universe16 By Chris Blake
![Page 17: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/17.jpg)
Small scale clustering
30/6/09Unity of the Universe17 By Chris Blake
![Page 18: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/18.jpg)
The UV galaxy luminosity function
N=9356 (photo-z)
N=1869 N=1039
N=2976
WiggleZN=47,747
30/6/0918 Unity of the Universe
Russell Jurek’s PhD
First ever sample of bright end of UV luminosity function
![Page 19: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/19.jpg)
30/6/09Unity of the Universe19 Russell Jurek’s PhD
MN
UV
-18
-
20
-
22
0.2 0.6 1.0 redshift (z) 0
.01
0.0
2
0
.03
Fract
ion
of
un
ivers
al st
ar
form
ati
on
den
sity
• WiggleZ galaxies have the highest SF at any redshift• Their contribution peaks at z≈0.6
UV contribution to star formation
![Page 20: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/20.jpg)
Growth of structure
30/6/09Unity of the Universe20
![Page 21: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/21.jpg)
Super starburst galaxies
30/6/09Unity of the Universe21
![Page 22: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/22.jpg)
Neutrino Mass
30/6/09Unity of the Universe22 By Chris Blake
Advantage of WiggleZGalaxies less
strongly clustered than LRGs
Higher redshift
Better power spectrum measurementHave many
more Fourier scales before it goes non linear
Non-linear growthof structure
![Page 23: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/23.jpg)
Summary
30/6/09Unity of the Universe23
Aims of WiggleZSurvey the largest ever
volume of the z>0.5 Universe
240,000 galaxies in 1 Gpc3
Measure BAO scale to 2%Measure constant w to
10%BAO not measured until
observations finish 2010 May
Many other science applications
The technology behind WiggleZ: 2dF positioning fibres on the AAT
![Page 24: 30/6/09 Unity of the Universe 1. Michael Drinkwater for the team Australia: Blake, Brough, Colless, Couch, Croom, Davis, Glazebrook, Jelliffe, Jurek,](https://reader035.vdocuments.us/reader035/viewer/2022062801/56649e365503460f94b261f9/html5/thumbnails/24.jpg)
2dF on a bad day
30/6/09Unity of the Universe24
Note the special error message: “Too many errors.”