2015MNRAS.448.2644H

Query : 2015MNRAS.448.2644H

2015MNRAS.448.2644H - Mon. Not. R. Astron. Soc., 448, 2644-2664 (2015/April-2)

Optical and X-ray profiles in the REXCESS sample of galaxy clusters.

HOLLAND J.G., BOHRINGER H., CHON G. and PIERINI D.

Abstract (from CDS):

Galaxy clusters' structure, dominated by dark matter, is traced by member galaxies in the optical and hot intracluster medium (ICM) in X-rays. We compare the radial distribution of these components and determine the mass-to-light ratio versus system mass relation. We use 14 clusters from the REXCESS sample which is representative of clusters detected in X-ray surveys. Photometric observations with the Wide Field Imager on the 2.2 m Max-Planck-Gesellschaft/European Southern Observatory telescope are used to determine the number density profiles of the galaxy distribution out to r200. These are compared to electron density profiles of the ICM obtained using XMM-Newton, and dark matter profiles inferred from scaling relations and a Navarro-Frenk-White model. While red sequence galaxies trace the total matter profile, the blue galaxy distribution is much shallower. We see a deficit of faint galaxies in the central regions of massive and regular clusters, and strong suppression of bright and faint blue galaxies in the centres of cool-core clusters, attributable to ram pressure stripping of gas from blue galaxies in high-density regions of ICM and disruption of faint galaxies due to galaxy interactions. We find a mass-to-light ratio versus mass relation within r200 of (3.0 ±0.4) ×10^2  h M_☉ L_☉^-1 at 1015M☉ with slope 0.16±0.14, consistent with most previous results.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: intracluster medium - dark matter - X-rays: galaxies: clusters

VizieR on-line data: <Available at CDS (J/MNRAS/448/2644): table1.dat tableb1.dat tablec1.dat>

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 2721 ClG 00 05 57.0 -34 43 09           ~ 99 0
2 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
3 ACO S 384 ClG 03 45 45.0 -41 10 42           ~ 40 0
4 ACO 3364 ClG 05 47 38.1 -31 52 15           ~ 86 0
5 ACO 3378 ClG 06 05 53.7 -35 18 06           ~ 90 1
6 MARD J061720.6-475002 ClG 06 16 51.4 -47 47 41           ~ 39 0
7 ACO 3404 ClG 06 45 29.50 -54 13 37.0           ~ 109 0
8 ACO 653 ClG 08 21 50.6 +01 11 49           ~ 47 0
9 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
10 ACO S 868 ClG 20 22 59.5 -20 56 40           ~ 35 1
11 ACO 2328 ClG 20 48 09.8 -17 50 14           ~ 78 0
12 ACO 3771 ClG 21 29 43.2 -50 48 34           ~ 50 0
13 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 87 2
14 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
15 ACO 3992 ClG 23 19 41.8 -73 13 51           ~ 38 0

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