2013A&A...557A..99K

Query : 2013A&A...557A..99K

2013A&A...557A..99K - Astronomy and Astrophysics, volume 557A99-99 (2013/9-1)

The extended GMRT radio halo survey. I. New upper limits on radio halos and mini-halos.

KALE R., VENTURI T., GIACINTUCCI S., DALLACASA D., CASSANO R., BRUNETTI G., MACARIO G. and ATHREYA R.

Abstract (from CDS):

A fraction of galaxy clusters host diffuse radio sources called radio halos, radio relics and mini-halos. These are associated with the relativistic electrons and magnetic fields present on ∼Mpc scales in the intra-cluster medium. We aim to carry out a systematic radio survey of all luminous galaxy clusters selected from the REFLEX and eBCS X-ray catalogues with the Giant Metrewave Radio Telescope, to understand the statistical properties of the diffuse radio emission in galaxy clusters. We present the sample and first results from the Extended GMRT Radio Halo Survey (EGRHS), which is an extension of the GMRT Radio Halo Survey (GRHS, Venturi et al. 2007A&A...463..937V, 2008A&A...484..327V). Analysis of radio data at 610/235/325MHz on 12 galaxy clusters are presented. We report the detection of a newly discovered mini-halo in the cluster RXJ1532.9+3021 at 610MHz. The presence of a small-scale relic (∼200kpc) is suspected in the cluster Z348. We do not detect cluster-scale diffuse emission in 11 clusters. Robust upper limits on the detection of radio halo of size of 1 Mpc are determined. We also present upper limits on the detections of mini-halos in a sub-sample of cool-core clusters. The upper limits for radio halos and mini-halos are plotted in the radio power- X-ray luminosity plane and the correlations are discussed. Diffuse extended emission that is not related to the target clusters, but detected as by-products in the sensitive images of two of the cluster fields (A689 and RXJ0439.0+0715) is also reported. Based on the information about the presence of radio halos (or upper limits), available on 48 clusters out of the total sample of 67 clusters (EGRHS+GRHS), we find that 23±7 % of the clusters host radio halos. The radio halo fraction rises to 31±11 %, when only the clusters with X-ray luminosities >8x1044 erg/s are considered. Mini-halos are found in ∼50% of cool-core clusters. A qualitative examination of the X-ray images of the clusters with no diffuse radio emission indicates that a majority of these clusters do not show extreme dynamical disturbances and supports the idea that mergers play an important role in generating radio halos and relics. The analysis of the full sample will be presented in a future work.

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Journal keyword(s): radio continuum: galaxies - galaxies: clusters: general

Simbad objects: 58

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Number of rows : 58
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 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
2 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
3 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
4 ZwCl 0104+0048 ClG 01 06 50.5 +01 04 10           ~ 67 0
5 BWE 0116+1107 GrG 01 19 01.32 +11 23 23.2           ~ 18 3
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
7 ClG J0142+2131 ClG 01 42 03.1 +21 30 39           ~ 60 1
8 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
9 NVSS J043652+071420 Rad 04 36 52.86 +07 14 20.5           ~ 2 0
10 ACT-CL J0437.1+0043 ClG 04 37 12.0820 +00 43 37.737           ~ 47 0
11 ACT-CL J0438.9+0716 ClG 04 39 00.7 +07 15 45           ~ 62 0
12 BAX 069.7593+05.3453 ClG 04 39 02.2 +05 20 43           ~ 82 0
13 NGC 1633 GiP 04 40 09.1159487424 +07 20 58.362331128   14.6       ~ 47 0
14 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
15 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
16 ACO 689 ClG 08 37 29 +14 59.5           ~ 53 0
17 [WHL2009] J083744.3+145247 ClG 08 37 44.33 +14 52 47.5           ~ 2 0
18 NVSS J083816+145057 Rad 08 38 16.82 +14 50 57.5           ~ 1 0
19 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
20 ZwCl 0847+3617 ClG 08 50 12.0 +36 03 36           ~ 75 0
21 ZwCl 0857+2107 ClG 09 00 36.90 +20 53 40.3           ~ 103 0
22 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
23 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 165 0
24 NVSS J094712+762312 Rad 09 47 12.37 +76 23 09.3           ~ 151 1
25 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 141 0
26 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
27 ZwCl 1113+0144 ClG 11 15 54.0 +01 29 44           ~ 42 0
28 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
29 MCXC J1212.3-1816 ClG 12 12 18.9 -18 16 43           ~ 17 0
30 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 72 0
31 ACO 1576 ClG 12 36 59.5 +63 11 18           ~ 116 0
32 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 118 0
33 ACO 1722 ClG 13 20 08.3 +70 04 33           ~ 63 0
34 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
35 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
36 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
37 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
38 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
39 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
40 [GMV2014] RX J1532.9+3021 S1 Rad 15 32 53.8 +30 20 59           ~ 2 0
41 ClG J1532+3021 ClG 15 32 53.8 +30 21 00           ~ 122 0
42 NAME RX J1532.9+3021 S1 ? 15 32 53.900 +30 20 59.15           ~ 1 0
43 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 192 0
44 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
45 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
46 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
47 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
48 ILT J172216.99+320912.9 BLL 17 22 16.99 +32 09 13.0           ~ 2 0
49 CXOGBA J172217.0+220913 X 17 22 17.0 +22 09 13           ~ 1 0
50 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
51 NVSS J172227+320757 rG 17 22 27.185 +32 07 57.25           ~ 47 1
52 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 63 0
53 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
54 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
55 ACO 2485 ClG 22 48 33 -16 07.1           ~ 53 0
56 ACO 2552 ClG 23 11 31.7 +03 37 44           ~ 87 0
57 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 265 0
58 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0

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