2014MNRAS.444L..44B

Query : 2014MNRAS.444L..44B

2014MNRAS.444L..44B - Mon. Not. R. Astron. Soc., 444, L44-L48 (2014/October-2)

A giant radio halo in the cool core cluster CL1821+643.

BONAFEDE A., INTEMA H.T., BRUGGEN M., RUSSELL H.R., OGREAN G., BASU K., SOMMER M., VAN WEEREN R.J., CASSANO R., FABIAN A.C. and ROTTGERING H.J.A.

Abstract (from CDS):

Giant radio haloes are Mpc-size sources found in some merging galaxy clusters. The synchrotron emitting electrons are thought to be (re)accelerated by plasma turbulence induced by the merging of two massive clusters. Cool core galaxy clusters have a low-temperature core, likely an indication that a major merger has not recently occurred. CL1821+643 is one of the strongest cool core clusters known so far. Surprisingly, we detect a giant radio halo with a largest linear size of ∼ 1.1 Mpc. We discuss the radio and X-ray properties of the cluster in the framework of the proposed models for giant radio haloes. If a merger is causing the radio emission, despite the presence of a cool core, we suggest that it should be off-axis, or in an early phase, or a minor one.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): acceleration of particles - radiation mechanism: non - thermal - methods: observational - galaxies: clusters: individual: CL1821+643 PSZ1 G094.00+274 - galaxies: clusters: intracluster medium - radio continuum: general

Simbad objects: 8

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Number of rows : 8
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 ACO 1664 ClG 13 03 42.4 -24 14 44           ~ 136 0
3 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
4 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
5 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
6 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
7 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 511 1
8 7C 1821+6419 Sy1 18 21 57.2130271440 +64 20 36.221312076   14.23 14.24     ~ 632 1

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