2013A&A...549A..19W

Query : 2013A&A...549A..19W

2013A&A...549A..19W - Astronomy and Astrophysics, volume 549A19-19 (2013/1-1)

Studying the properties of galaxy cluster morphology estimators.

WEISSMANN A., BOEHRINGER H., SUHADA R. and AMEGLIO S.

Abstract (from CDS):

X-ray observations of galaxy clusters reveal a large range of morphologies with various degrees of disturbance, showing that the assumptions of hydrostatic equilibrium and spherical shape, which are used to determine the cluster mass from X-ray data are not always satisfied. It is therefore important for the understanding of cluster properties as well as for cosmological applications to detect and quantify substructure in X-ray images of galaxy clusters. Two promising methods to do so are power ratios and center shifts. Since these estimators can be heavily affected by Poisson noise and X-ray background, we performed an extensive analysis of their statistical properties using a large sample of simulated X-ray observations of clusters from hydrodynamical simulations. We quantify the measurement bias and error in detail and give ranges where morphological analysis is feasible. A new, computationally fast method to correct for the Poisson bias and the X-ray background contribution in power ratio and center shift measurements is presented and tested for typical XMM-Newton observational data sets. We studied the morphology of 121 simulated cluster images and established structure boundaries to divide samples into relaxed, mildly disturbed and disturbed clusters. In addition, we present a new morphology estimator - the peak of the 0.3-1 r500P3/P0 profile to better identify merging clusters. The analysis methods were applied to a sample of 80 galaxy clusters observed with XMM-Newton. We give structure parameters (P3/P0in r500, w and P3/P0max) for all 80 observed clusters. Using our definition of the P3/P0(w) substructure boundary, we find 41% (47%) of our observed clusters to be disturbed.

Abstract Copyright: ∼

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

Simbad objects: 81

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Number of rows : 81
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 2717 ClG 00 03 12.9 -35 56 13           ~ 146 0
2 ACO 2700 ClG 00 03 49.7 +02 03 59           ~ 94 0
3 ACO 2721 ClG 00 05 57.0 -34 43 09           ~ 99 0
4 ACO 13 ClG 00 13 38.5 -19 30 19           ~ 107 1
5 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
6 ACO 22 ClG 00 20 41.4 -25 42 39           ~ 111 0
7 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
8 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
9 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
10 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
11 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
12 ACO 2941 ClG 01 45 03.60 -53 01 23.4           ~ 61 0
13 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
14 ACO 2984 ClG 02 11 25.1 -40 17 29           ~ 53 0
15 BAX 036.2925-29.4731 ClG 02 25 08.6 -29 28 34           ~ 36 0
16 ACT-CL J0232.2-4421 ClG 02 32 18.69 -44 20 41.5           ~ 130 0
17 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
18 ACO 3088 ClG 03 07 02.12 -28 39 57.3           ~ 78 0
19 ACO 3112 ClG 03 17 52.9 -44 15 06           ~ 329 1
20 ACO S 384 ClG 03 45 45.0 -41 10 42           ~ 40 0
21 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
22 ACO S 520 ClG 05 16 37.40 -54 30 01.5           ~ 114 0
23 ACT-CL J0528.8-3927 ClG 05 28 56.2 -39 27 49           ~ 78 0
24 ACT-CL J0532.9-3701 ClG 05 32 56.4 -37 01 34           ~ 57 0
25 ACO 3364 ClG 05 47 38.1 -31 52 15           ~ 86 0
26 ACO 3378 ClG 06 05 53.7 -35 18 06           ~ 90 1
27 MARD J061720.6-475002 ClG 06 16 51.4 -47 47 41           ~ 39 0
28 ACO 3404 ClG 06 45 29.50 -54 13 37.0           ~ 109 0
29 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
30 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
31 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
32 ACO 653 ClG 08 21 50.6 +01 11 49           ~ 47 0
33 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
34 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
35 ACO 868 ClG 09 45 28.1 -08 38 51           ~ 67 0
36 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 137 0
37 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 414 0
38 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
39 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 232 0
40 ACO 1084 ClG 10 44 37.1 -07 04 47           ~ 78 0
41 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
42 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 70 0
43 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
44 ACO S 700 ClG 12 36 41.8 -33 55 01           ~ 33 0
45 ACO 1589 ClG 12 41 08.09 +18 33 18.5           ~ 112 0
46 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
47 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 112 0
48 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
49 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
50 ACO 1775 ClG 13 41 50.60 +26 21 10.6           ~ 324 0
51 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
52 ACO 1837 ClG 14 01 36.2 -11 07 48           ~ 106 0
53 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
54 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
55 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 122 0
56 ACO 2051 ClG 15 16 47.15 -01 00 32.8           ~ 68 0
57 ACO 2065 ClG 15 22 22.7 +27 44 20           ~ 398 0
58 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
59 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
60 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
61 ACT-CL J2014.8-2430 ClG 20 14 49.7 -24 30 30           ~ 93 0
62 ACO S 868 ClG 20 22 59.5 -20 56 40           ~ 35 1
63 ACO 2328 ClG 20 48 09.8 -17 50 14           ~ 78 0
64 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
65 ACO 3771 ClG 21 29 43.2 -50 48 34           ~ 50 0
66 ACO 3814 ClG 21 49 07.24 -30 42 06.4           ~ 60 0
67 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
68 ACO 2399 ClG 21 57 19.01 -07 50 57.5           ~ 197 0
69 ACO 3827 ClG 22 01 49.1 -59 57 15           ~ 178 0
70 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 75 0
71 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 87 2
72 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
73 ACO 3911 ClG 22 46 22.6 -52 44 21           ~ 73 0
74 ACO 3921 ClG 22 49 59.0 -64 25 48           ~ 165 1
75 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 152 0
76 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 272 1
77 ACO 3992 ClG 23 19 41.8 -73 13 51           ~ 38 0
78 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
79 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 265 0
80 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0
81 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0

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