2008A&A...486L..31C


Query : 2008A&A...486L..31C

2008A&A...486L..31C - Astronomy and Astrophysics, volume 486, L31-34 (2008/8-2)

A morphological comparison between giant radio halos and radio mini-halos in galaxy clusters.

CASSANO R., GITTI M. and BRUNETTI G.

Abstract (from CDS):

In this letter we present a morphological comparison between giant radio halos and radio mini-halos in galaxy clusters based on radio-X-ray luminosity, P1.4-LX, and radio luminosity-size, P1.4-RH, correlations. We report evidence that P1.4-LX and P1.4-RH trends may also exist for mini-halos: mini-halo clusters share the same region of giant halo clusters in the (P1.4,LX) plane, whereas they are clearly separated in the (P1.4,RH) plane. The synchrotron emissivity of mini-halos is found to be more than 50 times larger than that of giant halos, implying a very efficient process for their origins. By assuming a scenario of sporadical turbulent particle re-acceleration for both giant and mini halos, we discuss basic physical differences between these sources. Regardless of the origin of the turbulence, a more efficient source of injection of particles, which eventually takes part in the re-acceleration process, is required in mini-halos, and this may result from the central radio galaxy or from proton-proton collisions in the dense cool core regions.

Abstract Copyright:

Journal keyword(s): radiation mechanism: non-thermal - galaxies: clusters: general - radio continuum: general - X-rays: general

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 - 2023
#notes
1 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 289 0
2 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2203 1
3 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 249 0
4 ClG J0947+7623 ClG 09 47 12.9 +76 23 13           ~ 147 1
5 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 101 0
6 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 307 1
7 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 535 0
8 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 289 0
9 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 747 0
10 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 802 1
11 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 58 0
12 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 676 2
13 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 242 0

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2023.09.28-03:03:03

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