dark universe observatory into the darkness peering…
TRANSCRIPT
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Dark Universe Observatory
Into the darkness peering…
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Dark Universe Observatory
Into the darkness peering…CMURichard Griffiths - PI
GSFCRobert Petre – Deputy PI Keith Jahoda Richard Mushotzky Nicholas White
MPEGuenther Hasinger – Co PIPeter Predehl Hans BoehringerPeter Friedrich Lothar Struder Norbert Meidinger Eckhard Kendziorra Elmar Pfeffermann
Joseph Mohr – U. IllinoisZoltan Haiman – Columbia U.
Xavier Barcons – IFC, SpainLynn Cominsky – Sonoma State U.Patrick Henry – U. HawaiiAbraham Loeb – Harvard U.Takamitsu Miyaji - CMU
BALLSteven Jordan William Purcell
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Dark Universe Observatory
Into the darkness peering…
Advantages of X-ray Clusters Can be well modeled X-rays are optically thin thermal radiation from material nearly in collisional equilibrium Not as simple as the microwave background Simpler than supernovae, galaxies or AGN
Fewer projection effects with X-ray selection X-rays are more peaked than galaxy distribution Fewer foreground/background objects Confining hot gas requires a real object of high mass
Close relation of X-ray observable to cluster mass
X-ray bright so seen to cosmological distances Crucial 0 < z < 1 interval where universal expansion changed from deceleration to acceleration
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Dark Universe Observatory
Into the darkness peering…
Comparison of dark matter and x-ray cluster and group distribution
every bound system visible in the numerical simulation is detected in the x-ray band - bright regions are massive
clusters, dimmer regions groups,
Dark matter simulation
X-ray emission insimulation
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Dark Universe Observatory
Into the darkness peering…Sensitivity to Dark Energy equation of state
Volume element
Comoving distance
Huterer & Turner
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Dark Universe Observatory
Into the darkness peering…Volume Element as a function of w
Dark Energy More volume at moderate redshift
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Cluster Evolution and Cosmology• The observables are the x-ray
luminosity, temperature correlation function and their evolution with z
• x-ray properties directly
connect to mass (Allen 2002)
X-ray properties of clusters tracemass
Mass temperature relationHorner et al 2001
Borgani and Guzzo2001
X-r
ay lu
min
osit
y
Mass
Mas
s
kT
opti
cal l
umin
osit
y
X- r
ay lu
min
osit
y
kT
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Dark Universe Observatory
Into the darkness peering…Instrument HeritageABRIXAS and XMM
• DUO has a high degree of heritage• 7 X-ray mirrors, focal length 1.6m• Total field of view 3.3 sq. degs.• Effective resolution 45 arcs.• 7 PN-CCDs, 0.3 – 10 keV
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Dark Universe Observatory
Into the darkness peering…
The optical system
E [keV]
Tel
esco
pe A
EF
F [
cm-2]
(1 te
lesc
ope)
10o
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Dark Universe Observatory
Into the darkness peering…
New pn-CCD detector performance
ADU
Num
ber
of E
vent
s New pn-CCD
0.28 keV
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Dark Universe Observatory
Into the darkness peering…
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Dark Universe Observatory
Into the darkness peering…
Contamination Cover
Winston Cone
Spacecraft Bus
Single-Axis Driven Solar Array
Star Tracker
Telescope
Contamination Cover
Winston Cone
Spacecraft Bus
Single-Axis Driven Solar Array
Star Tracker
Telescope
On Orbit Stowed in 63 Taurus Fairing
Ball RS300 Spacecraft
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Dark Universe Observatory
Into the darkness peering…
Observing Strategy (eff. > 60%)• DUO Deep SurveyDUO Deep Survey: 150-DUO Wide Survey:
6000 deg2
Within SDSS Northern Galactic Cap
8000 clusters with M > 2x1014 MO (kT>3.5 keV) complete to z=0.7Redshifts already available
DUO Deep Survey: 176deg2
1800 clusters, about 200 at z>1.0Southern Sky (ping-pong operation)Synergy with large SZ-SurveysOptical follow-up from VLT
Operations: Scan both regions in 2 years
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Dark Universe Observatory
Into the darkness peering…
Rosati, Borgani & Norman ARAA 40, 539, 2002
Contiguous
Goal
DUO Deep
DUO Wide
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Dark Universe Observatory
Into the darkness peering…
XMMmedium
XMM/Chandradeep
HEAO-1
ASCALSS
10010
001000
0BeppoSAX
HELLAS2XMM
DUO
DUO
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Dark Universe Observatory
Into the darkness peering…
Redshift distributions
2-10 keV X-ray flux versus R-band magnitude for optically identified X-ray sources from Chandra and ASCA X-ray surveys.
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Dark Universe Observatory
Into the darkness peering…One Square Degree of Deep Survey
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Dark Universe Observatory
Into the darkness peering…
Discrimination of Clusters vs. Active Galactic Nuclei
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Dark Universe Observatory
Into the darkness peering…
Measurements of Dark Energy with DUO
w
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Dark Universe Observatory
Into the darkness peering…
P(k) Neutrinos
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Dark Universe Observatory
Into the darkness peering…
Dark Matter Hot Gas