2007A&A...463..937V

Query : 2007A&A...463..937V

2007A&A...463..937V - Astronomy and Astrophysics, volume 463937-947 (2007/3-1)

GMRT Radio Halo Survey in galaxy clusters at z = 0.2-0.4. I. The REFLEX sub-sample.

VENTURI T., GIACINTUCCI S., BRUNETTI G., CASSANO R., BARDELLI S., DALLACASA D. and SETTI G.

Abstract (from CDS):

We present the first results of an ongoing project devoted to the search of giant radio halos in galaxy clusters located in the redshift range z=0.2-0.4. One of the main goals of our study is to measure the fraction of massive galaxy clusters in this redshift interval hosting a radio halo, and to constrain the expectations of the particle re-acceleration model for the origin of non-thermal radio emission in galaxy clusters. We selected 27 REFLEX clusters and here we present Giant Metrewave Radio Telescope (GMRT) observations at 610MHz for 11 of them. The sensitivity (1σ) in our images is in the range 35-100µJy/beam for all clusters. We found three new radio halos, doubling the number of halos known in the selected sample. In particular, giant radio halos were found in A209 and RXCJ2003.5-2323, and one halo (of smaller size) was found in RXCJ1314.4-2515. Candidate extended emission on smaller scale was found around the central galaxy in A3444 which deserves further investigation. Furthermore, a radio relic was found in A521, and two relics were found in RXCJ1314.5-2515. The remaining six clusters observed do not host extended emission of any kind.

Abstract Copyright: ∼

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

Simbad objects: 29

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Number of rows : 29
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 2697 ClG 00 03 11.5 -06 05 30           ~ 53 0
2 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
3 ACO 2813 ClG 00 43 22.8 -20 37 21           ~ 111 0
4 ACO 141 ClG 01 05 37.183 -24 40 49.95           ~ 87 0
5 ACO 2895 ClG 01 18 07.985 -26 58 00.42           ~ 54 0
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
7 ACO 3088 ClG 03 07 02.12 -28 39 57.3           ~ 78 0
8 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
9 ACT-CL J0437.1+0043 ClG 04 37 12.0820 +00 43 37.737           ~ 47 0
10 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
11 ACT-CL J0510.7-0801 ClG 05 10 43.85 -08 01 13.0           ~ 38 0
12 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
13 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
14 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
15 ACO 3444 ClG 10 23 53.1540 -27 15 07.840           ~ 97 0
16 ZwCl 1113+0144 ClG 11 15 54.0 +01 29 44           ~ 42 0
17 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
18 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 118 0
19 ACO S 780 ClG 14 59 29.1 -18 10 45           ~ 93 0
20 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
21 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
22 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
23 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 63 0
24 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 676 1
25 ACO 2485 ClG 22 48 33 -16 07.1           ~ 53 0
26 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 152 0
27 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0
28 ACO 2645 ClG 23 41 17.0 -09 01 11           ~ 98 0
29 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0

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