2007A&A...461...71P


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:13:33

2007A&A...461...71P - Astronomy and Astrophysics, volume 461, 71-80 (2007/1-1)

Temperature profiles of a representative sample of nearby X-ray galaxy clusters.

PRATT G.W., BOEHRINGER H., CROSTON J.H., ARNAUD M., BORGANI S., FINOGUENOV A. and TEMPLE R.F.

Abstract (from CDS):

A study of the structural and scaling properties of the temperature distribution of the hot, X-ray emitting intra-cluster medium of galaxy clusters, and its dependence on dynamical state, can give insights into the physical processes governing the formation and evolution of structure. Accurate temperature measurements are a pre-requisite for a precise knowledge of the thermodynamic properties of the intra-cluster medium. We analyse the X-ray temperature profiles from XMM-Newton observations of 15 nearby (z<0.2) clusters, drawn from a statistically representative sample. The clusters cover a temperature range from 2.5keV to 8.5 keV, and present a variety of X-ray morphologies. We derive accurate projected temperature profiles to ∼0.5R200, and compare structural properties (outer slope, presence of cooling core) with a quantitative measure of the X-ray morphology as expressed by power ratios. We also compare the results to recent cosmological numerical simulations. Once the temperature profiles are scaled by an average cluster temperature (excluding the central region) and the estimated virial radius, the profiles generally decline in the region 0.1R200≲R≲0.5R200. The central regions show the largest scatter, attributable mostly to the presence of cool core clusters. There is good agreement with numerical simulations outside the core regions. We find no obvious correlations between power ratio and outer profile slope. There may however be a weak trend with the existence of a cool core, in the sense that clusters with a central temperature decrement appear to be slightly more regular. The present results lend further evidence to indicate that clusters are a regular population, at least outside the core region.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies: clusters - galaxies: clusters: general - intergalactic medium - cosmology: observations

CDS comments: Paragraph A.4 Abell 3387 is a misprint for Abell 3378. Paragraph A.5 Abell 1048 is a misprint for Abell 1084.Paragraph A.14 Abell 3584 is a misprint for Abell 3854.

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 - 2021
#notes
1 ACO 2700 ClG 00 03 49.7 +02 03 59           ~ 80 0
2 ACO 22 ClG 00 20 34.8 -25 41 51           ~ 96 0
3 ACO 3364 ClG 05 47 36.1753 -31 52 22.695           ~ 64 0
4 ACO 3378 ClG 06 05 52.6923 -35 18 32.801           ~ 72 1
5 ACO 1084 ClG 10 44 37.1 -07 04 47           ~ 69 0
6 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 61 0
7 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 91 0
8 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1033 0
9 ACO 2050 ClG 15 16 21.6 +00 05 59           ~ 90 0
10 ACO 2051 ClG 15 16 53.8 -01 05 06           ~ 47 0
11 ACO S 868 ClG 20 23 00 -20 56.3           ~ 30 1
12 ACO 2328 ClG 20 48 13.9 -17 48 53           ~ 67 0
13 ACO 3771 ClG 21 29 47.7233 -50 46 37.428           ~ 40 0
14 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 59 0
15 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 71 2

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:13:33

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