2016MNRAS.455L..41B

Query : 2016MNRAS.455L..41B

2016MNRAS.455L..41B - Mon. Not. R. Astron. Soc., 455, L41-L45 (2016/January-1)

Do radio mini-halos and gas heating in cool-core clusters have a common origin?

BRAVI L., GITTI M. and BRUNETTI G.

Abstract (from CDS):

In this Letter, we present a study of the central regions of cool-core clusters hosting radio mini-halos, which are diffuse synchrotron sources extended on cluster-scales surrounding the radio-loud brightest cluster galaxy. We aim to investigate the interplay between the thermal and non-thermal components in the intracluster medium in order to get more insights into these radio sources, whose nature is still unclear. It has recently been proposed that turbulence plays a role for heating the gas in cool cores. By assuming that mini-halos are powered by the same turbulence, we expect that the integrated radio luminosity of mini-halos, νPν, depends on the cooling flow power, PCF, which in turn constrains the energy available for the non-thermal components and emission in the cool-core region. We carried out a homogeneous re-analysis of X-ray Chandra data of the largest sample of cool-core clusters hosting radio mini-halos currently available ( ∼ 20 objects), finding a quasi-linear correlation, νP_ν ∝P_CF^0.8. We show that the scenario of a common origin of radio mini-halos and gas heating in cool-core clusters is energetically viable, provided that mini-halos trace regions where the magnetic field strength is B ≫ 0.5µG.

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

Journal keyword(s): radiation mechanisms: non-thermal - methods: data analysis - galaxies: clusters: general - galaxies: clusters: intracluster medium - galaxies: magnetic fields - radio continuum: general

Simbad objects: 23

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Number of rows : 23
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 ACT-CL J0159.8-0849 ClG 01 59 49.4 -08 50 00           ~ 98 0
2 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
3 RX J0329.6-0211 ClG 03 29 41.6 -02 11 47           ~ 155 0
4 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 402 1
5 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
6 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 165 0
7 NVSS J094712+762312 Rad 09 47 12.37 +76 23 09.3           ~ 151 1
8 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
9 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
10 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
11 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
12 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
13 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
14 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
15 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
16 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
17 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
18 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0
19 ZwCl 1742+3306 ClG 17 44 16.2753 +32 59 55.115           ~ 93 0
20 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 181 0
21 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
22 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 265 0
23 ACT-CL J2344.7-4243 ClG 23 44 43.9 -42 43 11           ~ 229 0

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