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The XENIA mission Cosmic chemical evolution of baryons
Dieter H. Hartmann
C. Kouveliotou, Martin C. Weisskopf, J.W. den Herder, L. Piro, T. Ohashi, D. Burrows
and the Xenia team: consortium of Institutes from
US, Eu, Japan
https://ntrs.nasa.gov/search.jsp?R=20120003044 2018-05-18T00:07:21+00:00Z
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Xenia will trace structure formation Gamma-Ray Bursts • Evolution of massive star formation using GRBs to trace their explosions back to z > 8) • Measure the metals in the host galaxies of GRBs and the explosive enrichment in their close environment out to z>8 Clusters of Galaxies • Trace the evolution and physics of clusters out to their formation epoch (z>1) • Measure the thermodynamical and chemical properties of a fair sample out to the virial radius
Cosmic Web • Detect the largest reservoir of baryons from z~1 to the present time by measuring densities ~30 times smaller than previously done
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Xenia mission profile
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Xenia instruments
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CRIS Cryogenic Imaging Spectrometer
Area [email protected] Energy range: 0.1-3 keV Resolution: 2.5eV (1eV goal) Field of view=1.0° ang.res=3’
TES microcalorimeters
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Xenia instruments
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HARI High Angular Resolution Imager
Area =1000cm2@1keV Range: 0.3-8 keV Field of view=1.4° ang.res=10” constant CCD
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Xenia instruments
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TED Transient Event Detector
Eff area= 1500 cm2 8-200 keV (goal <5 keV) 3 sr (¼ of the sky,) 3’ localization
2 CZT based coded mask detectors
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GRBs as cosmological probes
• TED: 150 GRB localized per year, 80 GRB with Fluence(15-150keV) > 10-6 erg cm-2 s-1
• GRB @ z>6: 7-14 (goal) per year • Mid-bright GRB afterglow with a fast (t<60s)
pointing CRIS yields 105-6 X-ray photons, and 103 cts in 1 eV resolution bin
• In 5 years: Golden sample of >250 afterglows with high resolution X-ray spectra: redshift, metals in host-galaxy and close environment from local to high-z universe
• Platinum sample of 150 afterglows for WHIM studies
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Exploring a new region of the Cosmic web
Hot (clusters)
WHIM
Cold Diffuse Star forming
Cluster @ Virial r.
Branchini et al 2009
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Tomography of the Universe: the X-ray forest from the Cosmic Web with GRBs
~200s OVII-OVIII filaments in 5 years
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3D mapping of the Cosmic Web Detected, OVII+OVIII in emission, 5 σ, 1 Ms
Model, ∆z=0.01
4°x4
°
Down to overdensities of 100
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GRBs as cosmological probes
• TED: 150 GRB localized per year, 80 GRB with Fluence(15-150keV) > 10-6 erg cm-2 s-1
• GRB @ z>6: 7-14 (goal) per year • Mid-bright GRB afterglow with a fast (t<60s)
pointing CRIS yields 105-6 X-ray photons, and 103 cts in 1 eV resolution bin
• In 5 years: Golden sample of >250 afterglows with high resolution X-ray spectra: redshift, metals in host-galaxy and close environment from local to high-z universe
• Platinum sample of 150 afterglows for WHIM studies
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Xenia X-ray spectrum of a GRB
MCG-6-30-15, Lee et al, Chandra HEGT 120 ksec
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Tracing the metal enrichment in the GRB local environment
X-ray metal edges from a GRB nearby environment at z=7
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ISM of the host galaxies
Chemical c., ionization, kinematics (outflows) in galaxies up to z>7
Resonant absorption lines from GRB host galaxy at z=1
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Summary
• Medium class mission proposed to the 2010
Decadal Survey • Xenia Unique capabilities: large grasp, fast
reaction, high spectral resolution) • Core science: GRB as probes, WHIM, clusters • + Auxiliary science • Brings in a large community outside GRBs
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7 –TDRSS at GEO (35888 km) Supports: Ka-band 27.5-22.2 GHz 25 Mbps up, 800 Mbps dw Ku-band 15.0-13.7 GHz 25 Mbps up, 300 Mbps dw S-band 2.3-2.0 GHz 300 kbps up, 6 Mbps dw
Science data 3.8 Mbps orbital average
Ku-band
GRB alerts, TOO Engineering data 4 kbps, S-band
Notes: This communication strategy is similar to FERMI (formerly GLAST), and suggested in EDGE.
24 –GPS L-band 1.575-1.227 GHz 50 bps
WSGT White Sands NM
GSFC Goddard MD
GRGT Guam Xenia
600 km orbit
Avionics: Communication Strategy
3 - Ground stations
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Spectroscopy: fast reaction and wide field
• Line spectroscopy merit factor for variable sources = S/N for EW=1eV for a typical GRB afterglow
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X-ray Narrow abs lines from ISM in our own “host galaxy”
• Bright galactic binary (1820-303) observed with Chandra grating (Yao and Wand 2006)
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• Suggest using Ball Aerospace M-95 CMG 4 wheel pyramid configuration for all slews, station keeping, and observations.
• Provides up to 6.1 Nm torque (~4.0 Nm required for Xenia)
Fast repointing
Ball Aerospace Worldview CMG Requirement: < 65 sec for 80% GRB)
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CRIS
• Mirror: 2/4 reflection • TES microcalorimeter
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Transient Event Detector
• 2 Coded Mask / CZT detectors
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NGC4051 Krongold et al 2009
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Back up slides
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Observing programme
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HARI
• Mirror: Polynomial
profile with constant PSF
• CCD
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Satellite and payload HARI
bulkhead scope support
bulkhead scope support
bulkhead scope support
scope support
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Back to the Future • Future X-ray missions based on new generation of
Transition Edge Sensor microcalorimeters (<2 eV resolution)
• International X-ray Observatory (IXO) - Xenia • Exciting drivers addressing cosmology in X-rays
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Tracing clusters at virial radius
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Configuration: Falcon Shroud
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Configuration
◙ .15
1.4 2.7
4
2.5
10.5
c.g.
3
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EDGE/XENIA
Cosmic chemical evolution of baryons
L. Piro on behalf of the EDGE/XENIA collaboration
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39 08/02/2012 39 L. Piro, EDGE/XENIA - Missioni 08
Cluster evolution Survey Wide Deep-1 Deep-2
Exposure 50 ks 1 Ms 2 Ms Total area (deg2) 340 11.5 8 Clusters @ z>1 1800 510 600 Clusters, TX @ z>1 450 140 170
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WFImager: polynomial optics
-150
-100
-50
050
100
150
-400
-300
-200
-1000
100
200
300
400
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Auxiliary Science
• Cosmological parameters (Clusters & GRBs)
• Feedback processes • AGN • Physics and Progenitors of GRBs • The densest matter • Violent accretion on compact
objects • Stars • Solar system • Search for light Dark Matter
(sterile neutrinos) • Gravitational waves from SMBH
mergers
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Metal and ISM evolution with GRB Metal enrichment in
the environment of massive stars upto
z>6
X-ray metal edges from a GRB nearby environment at z=7
ISM of the host galaxy, kinematical studies
of the outflows
Resonant absorption lines from GRB host galaxy at z=1
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Payload I • WFM → coded mask, CZT detector
• GRBD 2 scintillators (NaI)
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Payload II • WFS 2/4 fold → TES calorimeter
• WFI → polinomial, CCD
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z
10
1
0 Stars Galaxies Clusters Filaments
Structure size
Structure Formation
GRB as cosmological beacons: fast reaction, high res. absorption spectroscopy
High resolution spectroscopy and spatial resolution, wide field in emission
Most of the baryon of the Universe are locked in large scale, low density structures visible only in X-rays
HOW ?
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XENIA: Mission and Payload
TED: Transient Event Detector ¼ of the sky, 3’ localization 8-200 keV
CRIS: Cryogenic Imaging Spectrometer [email protected] 0.1-3 keV TES DE<2.5eV Field=1.0° ang.res=3’
HARI: High Angular Resolution Imager 1000cm2@1keV 0.3-8 keV CCD Field=1.4° ang.res=10” constant
•Low bkg: LEO equatorial •Autonomous fast pointing in 60 s •2 tons •TRL≥4 •Decadal Survey • medium size