Cluster science in Cluster science in COSMOS/LoCuSS with lessons COSMOS/LoCuSS with lessons

for eROSITA and XEUSfor eROSITA and XEUSAlexis FinoguenovAlexis Finoguenov

and COSMOS/LoCuSS teamsand COSMOS/LoCuSS teams

2

COSMOS

With thanks to O.Ilbert and COSMOS photometry team

200 clusters in COSMOS

3

LSS at 0.13, 0.22, 0.34, 0.37, 0.51, 0.73, 0.89(Optical groups:0.22,0.36,0.38)

K.Kovac

X-ray properties vs X-ray properties vs environmentenvironment

4A. Faltenbacher, AF in prep.

AF, et al. in prep.

Redshift ACF for clusters

5Nico Cappelluti

Coil et al. 2006

90 clusters with z

Using the ACF value at 10/h Mpc of 0.62+/- 0.10 b(z=0.26)= 1.66 +/- 0.3Mvir = 2-8 10^13 solar mass M500~0.5Mvir (1-4 10^13 Msun)

Alexis Finoguenov looking through the lens at the X-ray cluster Universe

6

COSMOS

Massey,AF, et al. 2007

Stacked weak lensing in COSMOS

A. Leauthaud, AF, J.P.Kneib et al. in prep

7

Alexis Finoguenov 8

Lx-M relation

LoCuSS wl

SDSS wl (Rykoff et al’08

COSMOS wl+self-calibration

Cluster survey logistics

Alexis Finoguenov 9

RASS, 400d COSMOS eROSITA XEUS

Source detection cell

0.5-4 arcminute 0.5-1 arcminute

0.5-4 arcminutes

0.1-0.5 arcminute

Optical photometry

None Subaru, CFHT SDSS, PANSTARRS, SNAP,GROND

VISTA

Optical spectroscopy

Several years on 2m-class telescopes

VLT, IMACS SDSS, SPACE, DESTINY, LAMOST

10+ meter class telescopes

Mass measurement

ROSAT,ASCA, Chandra, XMM

ACS, XMM DUNE, SNAP,eROSITA, Subaru, CFHT

SKA, XEUS

Alexis Finoguenov looking through the lens at the X-ray cluster Universe

10

COSMOS: X-ray selected clusters with weak lensing detection

Scatter in prediction vs detection is around 30%

James Taylor, AF, et al. in prep.

eROSITAeROSITA

11

Low scatter X-ray proxy for the mass

Kravtsov et al. 2006

12T

ypical X

-ray mass d

etermin

ations

Typ

ical X-ray m

ass determ

ination

s

SDSS WLSDSS WL

Subaru Subaru WLWL

MACSMACS

13

Weak lensing calibration of Yx

morphologySingleElliptical or Complexsmall secondary or Off-center

GROND is contributing to studies of background galaxies to achieve reliable shear-mass conversion

Alexis Finoguenov looking through the lens at the X-ray cluster Universe

14

Conclusions• COSMOS yields one of the largest catalogs of distant (z>0.3) clusters

• At low redshifts X_ray groups resolve over 20% of matter in dense environments, thus playing an important role in resolving WHIM

• M-L relation based on weak lensing mass estimates is in agreement between COSMOS+LoCuSS vs SDSS work and also compares well to Reiprich and Boehringer 2002.

• Autocorrelation of halos confirms the high mass associated with most of the systems

• First weak lensing calibration of the Yx parameter at z~0.2 has been achieved.