2015A&A...575A...8D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST13:10:14

2015A&A...575A...8D - Astronomy and Astrophysics, volume 575A, 8-8 (2015/3-1)

Diffuse radio emission in the complex merging galaxy cluster Abell 2069.

DRABENT A., HOEFT M., PIZZO R.F., BONAFEDE A., VAN WEEREN R.J. and KLEIN U.

Abstract (from CDS):

Galaxy clusters with signs of a recent merger in many cases show extended diffuse radio features. This emission originates from relativistic electrons that suffer synchrotron losses due to the intracluster magnetic field. The mechanisms of particle acceleration and the properties of the magnetic field are still poorly understood. We search for diffuse radio emission in galaxy clusters. Here, we study the complex galaxy cluster Abell2069, for which X-ray observations indicate a recent merger. We investigate the cluster's radio continuum emission by deep Westerbork Synthesis Radio Telescope (WSRT) observations at 346 MHz and Giant Metrewave Radio Telescope (GMRT) observations at 322MHz. We find an extended diffuse radio feature roughly coinciding with the main component of the cluster. We classify this emission as a radio halo and estimate its lower limit flux density at 25±9mJy. Moreover, we find a second extended diffuse source located at the cluster's companion and estimate its flux density at 15±2mJy. We speculate that this is a small halo or a mini-halo. If true, this cluster is the first example of a double-halo in a single galaxy cluster.

Abstract Copyright:

Journal keyword(s): magnetic fields - radiation mechanisms: non-thermal - turbulence - galaxies: clusters: individual: Abell 2069 - galaxies: clusters: intracluster medium

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ClG 0217+70 ClG 02 17 00.0 +70 36 00           ~ 18 0
2 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1266 1
3 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1022 0
4 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3716 1
5 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62     ~ 262 0
6 ACO 2069 ClG 15 23 57.9 +29 53 26           ~ 122 0
7 SDSS J152358.66+295511.0 G 15 23 58.661 +29 55 11.02           ~ 1 0
8 WISEP J152418.10+295602.5 IR 15 24 18.10 +29 56 02.5           ~ 1 0
9 MCG+05-36-028 GiC 15 24 20.430 +29 57 20.02   15.6       ~ 10 0
10 NAME Corona Borealis SCG 15 25 +29.5           ~ 116 0
11 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 205 0
12 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 492 1
13 NAME A2069 Supercluster SCG ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.07.12-13:10:14

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