1. Cluster Cosmology in Deep Fields
Alexis Finoguenov
MPE/UMBC +
A. Leauthaud, JP Kneib, M. Tanaka, R. Bielby, H. McCracken, J. Peacock, J. Taylor
COSMOS, SXDF, WIRDS teams

2. Contiguous X-ray cluster surveys in context
CDFS 0.3 sq.deg. 50cl
-16
Lockman Hole, 0.3sq.deg. 30cl
CDFN 0.2deg2 30 cl
SXDF 1.1 deg2: 100 cl
-15
XMM-COSMOS 2deg2: 300cl
Flux keV (cgs)
DEEP2 2.6 sq.degs
10 deg2 XMM-LSS (Pierre’ 04) 600 cl
SZ-CA (Boehringer’07) 600 cl
-14
-13
XBOOTES 9 deg2
Murray et al. 2005
Alexis Finoguenov
Cluster cosmology in Deep Fields
Area

3. Cluster X-ray number counts
COSMOS
CDFS XMM
Finoguenov et al.
Alexis Finoguenov
Cluster cosmology in Deep Fields
Rosati, Borgani & Norman, ARAA 2003

4. X-ray clusters: deep and wide
Deep: total of 10 sq.degs. At groups per sq.degs.: a total of 1000 groups
Wide: 20 sq.degs. at groups per sq.degs.: a total of 1000 groups
Guided XMM-CFHTLS: 100 sq.degs at 1 cluster per sq.degs.: total of 100 clusters
Alexis Finoguenov
Cluster cosmology in Deep Fields

5. Specifics of mass calibration
In most cases X-ray masses are not feasible due to both faint and compact origin of sources
Weak lensing data is best of its class (Leauthaud, AF, et al. 2010)
ACS imaging
Best photo-z
Clustering analysis using conditional on density mass function (Faltenbacher, AF,Drory 2010)
Alexis Finoguenov
Cluster cosmology in Deep Fields

6. Cluster cosmology in Deep Fields
SDSS WL
MACS
Subaru WL
Typical X-ray mass determinations
Alexis Finoguenov
Cluster cosmology in Deep Fields

7. Cluster cosmology in Deep Fields
COSMOS
Massey et al. 2007
Alexis Finoguenov
Cluster cosmology in Deep Fields

8. How to stack groups: significance
Alexis Finoguenov
Cluster cosmology in Deep Fields

9. Weak lensing binning scheme
Alexis Finoguenov
Cluster cosmology in Deep Fields

10. Mass surface density profiles
Alexis Finoguenov
Cluster cosmology in Deep Fields

11. Lx-Mass from weak lensing
lgM=0.6lgLx+C
Alexis Finoguenov
Cluster cosmology in Deep Fields

12. Cluster cosmology: SXDF
Alexis Finoguenov
Cluster cosmology in Deep Fields

13. Cluster cosmology in Deep Fields
WIRDS
Alexis Finoguenov
Cluster cosmology in Deep Fields

14. Breaking the record on the highest redshift X-ray selected cluster
Mdyn=1.1e14 Msun
Mx=6.e13Msun
Alexis Finoguenov
Cluster cosmology in Deep Fields

15. Cluster cosmology in Deep Fields
Conclusions
I presented how modern X-ray surveys identify dark matter halos through their X-ray emission
We used the stacked weak lensing to calibrate the mass-observable relation
An application to cosmology is shown with 5% constraint on σ8
Need a better precision on σ8 from CMB in order to constrain the non-Gaussianity
The record breaking X-ray cluster is found at z=1.623
Deeper observations of COSMOS are needed to extend the weak lensing calibration to z~1.5
Alexis Finoguenov
Cluster cosmology in Deep Fields

16. Stellar content of galaxy groups
Giodini, et al. arXiv
Less gas
Alexis Finoguenov
Cluster cosmology in Deep Fields
More stars

17. COSMOS vs WMAP-5 cosmology
We seem to understand the z<1
part of the COSMOS.
I will produce the random cluster catalog for cross-correlation analysis
Need to complete the spectro-z ID of high-z part in order to do cosmology. This is our advantage in comparison to many others!
COSMOS
Red M-L
Alexis Finoguenov
Cluster cosmology in Deep Fields

18. Cluster cosmology in Deep Fields
Relevant equations: I
Alexis Finoguenov
Cluster cosmology in Deep Fields

19. Relevant equations: II
Alexis Finoguenov
Cluster cosmology in Deep Fields

20. Cluster cosmology in Deep Fields
220 clusters in COSMOS
LSS at 0.12, 0.22, 0.34, 0.37, 0.51, 0.73, 0.89
(Optical groups:0.22,0.36,0.38)
K.Kovac
Alexis Finoguenov
Cluster cosmology in Deep Fields