2006MNRAS.368..518V

Query : 2006MNRAS.368..518V

2006MNRAS.368..518V - Mon. Not. R. Astron. Soc., 368, 518-533 (2006/May-2)

Galaxy cluster mass profiles.

VOIGT L.M. and FABIAN A.C.

Abstract (from CDS):

Accurate measurements of the mass distribution in galaxy and cluster haloes are essential to test the cold dark matter (CDM) paradigm. The cosmological model predicts a universal shape for the density profile in all haloes, independent of halo mass. Its profile has a `cuspy' centre, with no evidence for the constant density core. In this paper, we carry out a careful analysis of 12 galaxy clusters, using Chandra data to compute the mass distribution in each system under the assumption of hydrostatic equilibrium. Due to their low concentration, clusters provide ideal objects for studying the central cusps in dark matter haloes. The majority of the systems are consistent with the CDM model, but four objects exhibit flat inner density profiles. We suggest that the flat inner profile found for these clusters is due to an underestimation of the mass in the cluster centre (rather than any problem with the CDM model), since these objects also have a centrally peaked gas mass fraction. We discuss possible causes for erroneously low-mass measurements in the cores of some systems.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

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

Simbad objects: 17

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Number of rows : 17
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 3112 ClG 03 17 52.9 -44 15 06           ~ 329 1
2 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
3 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 402 1
4 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
5 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
6 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
7 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
8 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
9 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
10 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
11 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 197 3
12 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
13 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
14 ClG J1532+3021 ClG 15 32 53.8 +30 21 00           ~ 122 0
15 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 390 0
16 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 272 1
17 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0

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