2005A&A...435....1P


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST05:04:20

2005A&A...435....1P - Astronomy and Astrophysics, volume 435, 1-7 (2005/5-3)

The structural and scaling properties of nearby galaxy clusters. I. The universal mass profile.

POINTECOUTEAU E., ARNAUD M. and PRATT G.W.

Abstract (from CDS):

We present the integrated mass profiles for a sample of ten nearby (z≲0.15), relaxed galaxy clusters, covering a temperature range of [2-9]keV, observed with XMM-Newton. The mass profiles were derived from the observed gas density and temperature profiles under the hypothesis of spherical symmetry and hydrostatic equilibrium. All ten mass profiles are well described by an NFW-type profile over the radial range from 0.01 to 0.5R200, where R200 is the radius corresponding to a density contrast of 200 with respect to the critical density at the cluster redshift. A King model is inconsistent with these data. The derived concentration parameters and total masses are in the range c200=4-6 and M200=1.2x1014-1.2x1015M, respectively. Our qualitative and quantitative study of the mass profile shape shows, for the first time, direct and clear observational evidence for the universality of the total mass distribution in clusters. The mass profiles scaled in units of R200 and M200 nearly coincide, with a dispersion of less than 15% at 0.1R200. The c200-M200 relation is consistent with the predictions of numerical simulations for a ΛCDM cosmology, taking into account the measurement errors and expected intrinsic scatter. Our results provide further strong evidence in favour of the Cold Dark Matter cosmological scenario and show that dark matter collapse is well understood, at least down to the cluster scale.

Abstract Copyright:

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

Status at CDS:  

Simbad objects: 11

goto Full paper

goto View the reference in ADS

Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 2717 ClG 00 03 12.9 -35 56 13           ~ 127 0
2 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 466 0
3 2MASX J07473129-1917403 BiC 07 47 31.296 -19 17 40.34   19.60       ~ 393 1
4 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 364 0
5 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 183 0
6 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 379 0
7 ACO 1983 ClG 14 52 44.0 +16 44 46           ~ 234 1
8 ACO 1991 ClG 14 54 30.2 +18 37 51           ~ 304 1
9 BAX 233.1222+04.6817 ClG 15 32 29.3 +04 40 54     15.13     ~ 58 0
10 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 396 0
11 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 490 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005A&A...435....1P and select 'bookmark this link' or equivalent in the popup menu


2020.06.02-05:04:20

© Université de Strasbourg/CNRS

    • Contact