2015MNRAS.447.1895R

Query : 2015MNRAS.447.1895R

2015MNRAS.447.1895R - Mon. Not. R. Astron. Soc., 447, 1895-1910 (2015/February-3)

Early science with the Karoo Array Telescope: a mini-halo candidate in galaxy cluster Abell 3667.

RISELEY C.J., SCAIFE A.M.M., OOZEER N., MAGNUS L. and WISE M.W.

Abstract (from CDS):

Abell 3667 is among the most well-studied galaxy clusters in the Southern hemisphere. It is known to host two giant radio relics and a head-tail radio galaxy as the brightest cluster galaxy. Recent work has suggested the additional presence of a bridge of diffuse synchrotron emission connecting the north-western radio relic with the cluster centre. In this work, we present full-polarization observations of Abell 3667 conducted with the Karoo Array Telescope at 1.33 and 1.82 GHz. Our results show both radio relics as well as the brightest cluster galaxy. We use ancillary higher resolution data to subtract the emission from this galaxy, revealing a localised excess, which we tentatively identify as a radio mini-halo. This mini-halo candidate has an integrated flux density of 67.2±4.9 mJy/beam at 1.37 GHz, corresponding to a radio power of P1.4GHz = 4.28±0.31x1023 W/ Hz, consistent with established trends in mini-halo power scaling.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): magnetic fields - polarization - galaxies: clusters: individual: Abell 3667 - radio continuum: general

Simbad objects: 21

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Number of rows : 21
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 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
3 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 910 1
4 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
5 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
6 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
7 ZwCl 1856+6616 ClG 18 56 38.4 +66 23 10           ~ 48 0
8 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
9 [CBS2013] 5 Rad 20 09 25.3 -56 33 27           ~ 3 0
10 SUMSS J200930-570058 Rad 20 09 30.52 -57 00 58.1           ~ 1 0
11 [CBS2013] 13 Rad 20 09 40.2 -56 53 56           ~ 2 0
12 PMN J2011-5644 rG 20 11 27.5061252528 -56 44 07.084747536   16.56   15.16   ~ 26 1
13 SUMSS J201155-571655 Rad 20 11 55.97 -57 16 55.8           ~ 1 0
14 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 676 1
15 SUMSS J201309-560842 Rad 20 13 09.29 -56 08 42.4           ~ 1 0
16 SUMSS J201330-570552 Rad 20 13 30.19 -57 05 52.4           ~ 3 0
17 PMN J2014-5701 Rad 20 14 01.6 -57 01 10           ~ 5 0
18 SUMSS J201518-563440 Rad 20 15 18.12 -56 34 40.3           ~ 1 0
19 SUMSS J201524-563805 Rad 20 15 24.59 -56 38 05.2           ~ 1 0
20 QSO B2036-577 QSO 20 40 01.10158 -57 35 09.6521   22.0       ~ 21 1
21 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0

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