2015A&A...575A.127P

Query : 2015A&A...575A.127P

2015A&A...575A.127P - Astronomy and Astrophysics, volume 575A, 127-127 (2015/3-1)

Morphology parameters: substructure identification in X-ray galaxy clusters.

PAREKH V., VAN DER HEYDEN K., FERRARI C., ANGUS G. and HOLWERDA B.

Abstract (from CDS):

In recent years multi-wavelength observations have shown the presence of substructures related to merging events in a large proportion of galaxy clusters. Clusters can be roughly grouped into two categories - relaxed and non-relaxed - and a proper characterisation of the dynamical state of these systems is crucial for both astrophysical and cosmological studies. In this paper we investigate the use of a number of morphological parameters (Gini, M20, concentration, asymmetry, smoothness, ellipticity, and Gini of the second-order moment, GM) introduced to automatically classify clusters as relaxed or dynamically disturbed systems. We apply our method to a sample of clusters at different redshifts extracted from the Chandra archive and investigate possible correlations between morphological parameters and other X-ray gas properties. We conclude that a combination of the adopted parameters is a very useful tool for properly characterising the X-ray cluster morphology. According to our results, three parameters - Gini, M20, and concentration - are very promising for identifying cluster mergers. The Gini coefficient is a particularly powerful tool, especially at high redshift, because it is independent of the choice of the position of the cluster centre. We find that high Gini (>0.65), high concentration (>1.55), and low M20 (←2.0) values are associated with relaxed clusters, while low Gini (<0.4), low concentration (<1.0), and high M20 (>-1.4) characterise dynamically perturbed systems. We also estimate the X-ray cluster morphological parameters in the case of radio loud clusters. Since they are in excellent agreement with previous analyses we confirm that diffuse intracluster radio sources are associated with major mergers.

Abstract Copyright: ∼

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

Simbad objects: 103

goto Full paper

goto View the references in ADS

Number of rows : 103
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 813 0
2 ClG J0030+2618 ClG 00 30 33.6 +26 18 16           ~ 61 0
3 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
4 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 555 2
5 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 368 1
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 295 0
7 ClG J0141-3034 ClG 01 41 32.3 -30 34 42           ~ 9 1
8 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 258 3
9 ClG J0159+0030 ClG 01 59 18.2 +00 30 09           ~ 32 0
10 ClG J0230+1836 ClG 02 30 26.6 +18 36 22           ~ 19 0
11 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 396 0
12 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 566 0
13 ClG J0302-0423 ClG 03 02 21.3 -04 23 29           ~ 15 0
14 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 311 1
15 ClG J0318-0302 ClG 03 18 17.3 -03 01 21           ~ 25 0
16 ClG J0328-2140 ClG 03 28 36.1 -21 40 04           ~ 19 0
17 ClG J0333-2456 ClG 03 33 10.2 -24 56 41           ~ 14 0
18 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 383 1
19 ACO 3158 ClG 03 42 39.6 -53 37 50           ~ 304 0
20 ClG J0350-3801 ClG 03 50 43.9 -38 01 25           ~ 12 0
21 ClG J0355-3741 ClG 03 55 59.3 -37 41 46           ~ 16 0
22 ClG J0405-4100 ClG 04 05 24.3 -41 00 15           ~ 15 0
23 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 502 0
24 ClG 0422-09 ClG 04 25 51.02 -08 33 38.5           ~ 91 0
25 ACO 3266 ClG 04 31 11.9 -61 24 23           ~ 410 0
26 ACO 496 ClG 04 33 38.8 -13 15 59           ~ 694 2
27 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
28 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
29 ClG J0522-3624 ClG 05 22 13.8 -36 24 49           ~ 38 0
30 ClG J0542-4100 ClG 05 42 49.9 -40 59 58           ~ 62 0
31 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 305 0
32 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 202 1
33 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 209 0
34 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 963 1
35 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 297 1
36 ZwCl 0806+2822 ClG 08 09 41.0 +28 11 58           ~ 24 0
37 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
38 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 253 0
39 ClG J0853+5759 ClG 08 53 13.4 +57 59 44           ~ 24 0
40 ACO 754 ClG 09 09 08.4 -09 39 58           ~ 666 1
41 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 295 0
42 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1012 1
43 ClG J0926+1242 ClG 09 26 36.6 +12 42 59           ~ 39 0
44 ClG J0956+4107 ClG 09 56 03.4 +41 07 14           ~ 41 0
45 ClG J0958+4702 ClG 09 58 19.3 +47 02 00   22       ~ 20 0
46 ClG J1002+6858 ClG 10 02 07.7 +68 58 48           ~ 17 0
47 ClG J1003+3253 ClG 10 03 04.1 +32 54 28           ~ 29 0
48 ClG J1120+4318 ClG 11 20 07.6 +43 18 07           ~ 60 0
49 ClG J1120+2326 ClG 11 20 57.9 +23 26 41           ~ 40 0
50 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 151 0
51 ClG J1202+5751 ClG 12 02 13.7 +57 51 53           ~ 14 0
52 ACO 1489 ClG 12 12 19.2 +27 33 14           ~ 41 0
53 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 153 0
54 ClG J1221+4918 ClG 12 21 25.0 +49 18 07           ~ 58 0
55 SDSSCGB 65816 CGG 12 22 01.9 +27 09 19           ~ 15 0
56 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 215 0
57 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 366 1
58 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 304 0
59 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 290 0
60 ClG J1312+3900 ClG 13 12 19.4 +39 00 58           ~ 15 0
61 ACO 1736 ClG 13 26 52.1 -27 06 33           ~ 249 2
62 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 442 2
63 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 251 2
64 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 314 1
65 ClG J1334+5031 ClG 13 34.0 +50 31           ~ 8 0
66 ACO 3571 ClG 13 47 28.9 -32 51 57           ~ 284 2
67 ACO 1795 ClG 13 48 50.48 +26 35 07.4           ~ 1267 0
68 ClG J1354-0221 ClG 13 54 16.9 -02 21 47           ~ 46 0
69 ClG J1357+6232 ClG 13 57 19.4 +62 32 42           ~ 19 0
70 ClG J1416+4446 ClG 14 16 28.1 +44 46 38           ~ 47 0
71 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
72 ACO 1995 ClG 14 52 55.0 +58 02 59           ~ 130 0
73 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 175 0
74 ACO 2034 ClG 15 10 12.96 +33 29 53.2           ~ 215 1
75 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
76 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 730 1
77 ACT-CL J1521.8+0742 ClG 15 21 55.14 +07 41 27.2     15.13     ~ 311 0
78 ACO 2065 ClG 15 22 29.3 +27 42 22           ~ 374 0
79 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 397 2
80 ClG J1524+0957 ClG 15 24 40.3 +09 57 35           ~ 60 0
81 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
82 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 403 0
83 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 563 0
84 ACO 2199 ClG 16 28 43.31 +39 34 07.6           ~ 1171 1
85 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
86 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
87 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 359 0
88 ClG J1641+4001 ClG 16 41 52.3 +40 01 29           ~ 40 0
89 ClG J1701+6414 ClG 17 01 22.6 +64 14 09           ~ 72 0
90 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 281 0
91 ACO 2256 ClG 17 03 09.4 +78 39 36           ~ 885 1
92 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 568 0
93 ACO 2294 ClG 17 24 10.1 +85 53 09           ~ 63 0
94 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 461 1
95 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 59 0
96 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 627 1
97 ACO 3822 ClG 21 54 06.2 -57 50 49           ~ 87 0
98 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 316 1
99 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 539 0
100 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 503 2
101 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 269 3
102 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 335 3
103 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 380 1

To bookmark this query, right click on this link: simbad:objects in 2015A&A...575A.127P and select 'bookmark this link' or equivalent in the popup menu