2015A&A...580A..97C

Query : 2015A&A...580A..97C

2015A&A...580A..97C - Astronomy and Astrophysics, volume 580A, 97-97 (2015/8-1)

Occurrence of radio halos in galaxy clusters. Insight from a mass-selected sample.

CUCITI V., CASSANO R., BRUNETTI G., DALLACASA D., KALE R., ETTORI S. and VENTURI T.

Abstract (from CDS):

Giant radio halos (RH) are diffuse Mpc-scale synchrotron sources detected in some massive and merging galaxy clusters. An unbiased study of the statistical properties of RHs is crucial to constraining their origin and evolution. We investigate the occurrence of RHs and its dependence on the cluster mass in a Sunyaev-Zel'dovich (SZ)-selected sample of galaxy clusters, which is nearly a mass-selected sample. Moreover, we analyse the connection between RHs and merging clusters. We selected from the Planck SZ catalogue clusters with M≥6x1014M☉ at z=0.08-0.33 and we searched for the presence of RHs using the NVSS for z<0.2 and the GMRT RH survey (GRHS) and its extension (EGRHS) for 0.2<z<0.33. We used archival Chandra X-ray data to derive information on the dynamical status of the clusters. We confirm that RH clusters are merging systems while the majority of clusters without RH are relaxed, thus supporting the idea that mergers play a fundamental role in the generation of RHs. We find evidence for an increase in the fraction of clusters with RHs with the cluster mass and this is in line with expectations derived on the basis of the turbulence re-acceleration scenario. Finally, we discuss the effect of the incompleteness of our sample on this result.

Abstract Copyright: ∼

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: clusters: general - radio continuum: general - X-rays: galaxies: clusters

Simbad objects: 59

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Number of rows : 59
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 2697 ClG 00 03 11.5 -06 05 30           ~ 47 0
2 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 816 0
3 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 186 0
4 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 270 1
5 ZwCl 0104+5350 ClG 01 07 47.8 +54 08 31           ~ 29 0
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 295 0
7 ClG J0142+2131 ClG 01 42 03.1 +21 30 39           ~ 56 1
8 ACT-CL J0246.4-2033 ClG 02 46 24.9 -20 33 27           ~ 19 0
9 ACO 3088 ClG 03 07 02.12 -28 39 57.3           ~ 70 0
10 PLCKESZ G171.9-40.7 ClG 03 12 55 +08 22.8           ~ 48 0
11 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 502 0
12 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
13 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
14 MCXC J0616.3-2156 ClG 06 16 21.5 -21 56 30           ~ 22 0
15 ZwCl 0634+4750 ClG 06 38 07.5 +47 47 27           ~ 38 0
16 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
17 ACO 3411 ClG 08 41 47.7 -17 28 46           ~ 71 0
18 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 253 0
19 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 295 0
20 ACO 781 ClG 09 20 25.4 +30 30 07           ~ 154 0
21 ACO 3444 ClG 10 23 53.1540 -27 15 07.840           ~ 87 0
22 ACO 1132 ClG 10 58 32.05 +56 47 14.2           ~ 129 1
23 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 151 0
24 ACO 1351 ClG 11 42 24.7795 +58 32 05.558           ~ 79 0
25 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 430 0
26 ACO 1423 ClG 11 57 17.3206 +33 36 39.364           ~ 168 0
27 ACO 1437 ClG 12 00 24.5 +03 19 52           ~ 81 0
28 ACO 1451 ClG 12 03 17.3 -21 32 05           ~ 45 0
29 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 66 0
30 ACO 1576 ClG 12 36 59.5 +63 11 18           ~ 108 0
31 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 141 1
32 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
33 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 102 0
34 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 252 2
35 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 312 0
36 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 689 1
37 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
38 ACO S 780 ClG 14 59 29.1 -18 10 45           ~ 82 0
39 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 175 0
40 2MASX J15150305-1521537 ClG 15 14.9 -15 23           ~ 46 0
41 ACO 2104 ClG 15 40 06.8 -03 17 39           ~ 107 0
42 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 769 0
43 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 563 0
44 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
45 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
46 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 359 0
47 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 255 0
48 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 342 0
49 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 504 1
50 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 59 0
51 ZwCl 2120+2256 ClG 21 22 19.7 +23 10 30           ~ 21 0
52 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 131 0
53 NVSS J212709-120958 Rad 21 27 09.5 -12 09 58           ~ 132 1
54 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 688 2
55 ACO 3888 ClG 22 34 23.0 -37 43 29           ~ 138 1
56 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 137 0
57 ACO 2552 ClG 23 11 31.7 +03 37 44           ~ 78 0
58 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 171 0
59 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 175 0

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