2009A&A...499..679M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST23:48:17

2009A&A...499..679M - Astronomy and Astrophysics, volume 499, 679-695 (2009/6-1)

Comparative analysis of the diffuse radio emission in the galaxy clusters A1835, A2029, and Ophiuchus.

MURGIA M., GOVONI F., MARKEVITCH M., FERETTI L., GIOVANNINI G., TAYLOR G.B. and CARRETTI E.

Abstract (from CDS):

We recently performed a study of a sample of relaxed, cooling core galaxy clusters with deep Very Large Array observations at 1.4GHz. We find that in the central regions of A1835, A2029, and Ophiuchus the dominant radio galaxy is surrounded by a diffuse low-brightness radio emission that takes the form of a mini-halo. Here we present the results of the analysis of the extended diffuse radio emission in these mini-halos. In order to investigate the morphological properties of the diffuse radio emission in clusters of galaxies we propose to fit their azimuthally averaged brightness profile with an exponential, obtaining the central brightness and the e-folding radius from which the radio emissivity can be calculated. We investigate the radio properties of the mini-halos in A1835, A2029, and Ophiuchus in comparison with the radio properties of a representative sample of mini-halos and halos already known in the literature. We find that radio halos can have quite different length-scales but their emissivity is remarkably similar from one halo to the other. In contrast, mini-halos span a wide range of radio emissivity. Some of them, like the Perseus mini-halo, are characterized by a radio emissivity which is more than 100 times greater than that of radio halos. On the other hand, the new mini-halos in cooling core clusters analyzed in this work, namely A2029, Ophiuchus, and A1835, have a radio emissivity which is much more typical of halos in merging clusters rather than similar to that of the other mini-halos previously known.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: A1835, A2029, Ophiuchus - radio continuum: galaxies

Simbad objects: 19

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Number of rows : 19

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 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 572 0
2 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 519 0
3 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1939 1
4 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 88 0
5 ACO 655 ClG 08 25 30.3 +47 07 48           ~ 90 0
6 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 402 0
7 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 261 0
8 2MASX J13142209-2515456 ClG 13 14 31.5049 -25 15 56.602           ~ 87 0
9 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 469 0
10 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 621 1
11 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 852 0
12 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 519 0
13 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 780 1
14 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 317 0
15 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 240 0
16 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 502 0
17 ACO 2254 ClG 17 17 45.90 +19 40 22.8           ~ 58 0
18 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 414 1
19 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 625 2

    Equat.    Gal    SGal    Ecl

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2020.07.13-23:48:17

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