2008A&A...486..359L

Query : 2008A&A...486..359L

2008A&A...486..359L - Astronomy and Astrophysics, volume 486359-373 (2008/8-1)

Radial temperature profiles for a large sample of galaxy clusters observed with XMM-Newton.

LECCARDI A. and MOLENDI S.

Abstract (from CDS):

We measure radial temperature profiles as far out as possible for a sample of ≃50 hot, intermediate redshift galaxy clusters, selected from the XMM-Newton archive, keeping systematic errors under control. Our work is characterized by two major improvements. First, we used background modeling, rather than background subtraction, and the Cash statistic rather than the χ2. This method requires a careful characterization of all background components. Second, we assessed systematic effects in detail. We performed two groups of tests. Prior to the analysis, we made use of extensive simulations to quantify the impact of different spectral components on simulated spectra. After the analysis, we investigated how the measured temperature profile changes, when choosing different key parameters. The mean temperature profile declines beyond 0.2R180. For the first time, we provide an assessment of the source and the magnitude of systematic uncertainties. When comparing our profile with those obtained from hydrodynamic simulations, we find the slopes beyond ≃0.2R180 to be similar. Our mean profile is similar but somewhat flatter with respect to those obtained by previous observational works, possibly as a consequence of a different level of characterizing systematic effects. This work allows us to not only constrain cluster temperature profiles in outer regions with confidence, but also, from a more general point of view, to explore the limits of the current X-ray experiments (in particular XMM-Newton) with respect to the analysis of low surface-brightness emission.

Abstract Copyright: ∼

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

Simbad objects: 68

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Number of rows : 68
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 2700 ClG 00 03 49.7 +02 03 59           ~ 94 0
2 ACO 2721 ClG 00 05 57.0 -34 43 09           ~ 99 0
3 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
4 ACO 22 ClG 00 20 41.4 -25 42 39           ~ 111 0
5 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
6 ACO 2813 ClG 00 43 22.8 -20 37 21           ~ 111 0
7 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
8 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
9 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
10 ACO 2941 ClG 01 45 03.60 -53 01 23.4           ~ 61 0
11 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
12 ACT-CL J0232.2-4421 ClG 02 32 18.69 -44 20 41.5           ~ 130 0
13 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
14 RXC J0303.8-7752 ClG 03 03 46.40 -77 52 09.0           ~ 13 0
15 ACO 3088 ClG 03 07 02.12 -28 39 57.3           ~ 78 0
16 ACT-CL J0437.1+0043 ClG 04 37 12.0820 +00 43 37.737           ~ 47 0
17 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
18 ACO S 520 ClG 05 16 37.40 -54 30 01.5           ~ 114 0
19 ACT-CL J0528.8-3927 ClG 05 28 56.2 -39 27 49           ~ 78 0
20 ACT-CL J0532.9-3701 ClG 05 32 56.4 -37 01 34           ~ 57 0
21 ACO 3364 ClG 05 47 38.1 -31 52 15           ~ 86 0
22 ACO 3378 ClG 06 05 53.7 -35 18 06           ~ 90 1
23 MARD J061720.6-475002 ClG 06 16 51.4 -47 47 41           ~ 39 0
24 ACO 3404 ClG 06 45 29.50 -54 13 37.0           ~ 109 0
25 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
26 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
27 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
28 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
29 ACO 901 ClG 09 56 09.7 -09 56 17           ~ 113 1
30 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 137 0
31 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 414 0
32 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
33 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 232 0
34 ACO 1084 ClG 10 44 37.1 -07 04 47           ~ 78 0
35 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
36 ACO 1302 ClG 11 33 12.02 +66 22 26.9           ~ 81 0
37 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 70 0
38 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
39 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
40 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 266 2
41 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
42 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
43 ACO 1882 ClG 14 14 24.02 -00 22 39.9           ~ 47 0
44 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
45 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
46 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
47 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 122 0
48 ACO 2051 ClG 15 16 47.15 -01 00 32.8           ~ 68 0
49 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
50 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
51 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
52 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
53 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
54 ACT-CL J2011.4-5724 ClG 20 11 26.8 -57 25 09           ~ 48 0
55 ACT-CL J2014.8-2430 ClG 20 14 49.7 -24 30 30           ~ 93 0
56 ACO 2328 ClG 20 48 09.8 -17 50 14           ~ 78 0
57 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
58 ACO 3814 ClG 21 49 07.24 -30 42 06.4           ~ 60 0
59 ACO 2384 ClG 21 52 20.9 -19 32 53           ~ 117 0
60 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
61 ACO 3827 ClG 22 01 49.1 -59 57 15           ~ 178 0
62 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 87 2
63 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
64 ACO 3911 ClG 22 46 22.6 -52 44 21           ~ 73 0
65 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 152 0
66 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0
67 ZwCl 2341+0000 ClG 23 43 40.566 +00 18 18.94           ~ 83 0
68 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0

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