2011A&A...529A..69G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST02:44:46

2011A&A...529A..69G - Astronomy and Astrophysics, volume 529A, 69-69 (2011/5-1)

The large-scale diffuse radio emission in A781.

GOVONI F., MURGIA M., GIOVANNINI G., VACCA V. and BONAFEDE A.

Abstract (from CDS):

A781 belongs to a complex system characterized by extended X-ray emissions that may form part of line of clusters of galaxies along a filament. The aim of this work is to investigate the possible presence of extended, diffuse synchrotron radio emission connected to the intra-cluster medium of A781. We studied the radio continuum emission and the spectral index properties in the proximity of A781 by analyzing archival Very Large Array observations at 1400 and 325 MHz. The main cluster of the system is permeated by diffuse low-surface brightness radio emission which is classified as a radio halo because it is located close to the center. The diffuse emission presents the typical extension and radio power of the other halos known in the literature. Interestingly, the radio halo appears to be linked to a peripheral patch that was previously found in the literature. The spectrum of this peripheral emission shows a radial steepening, which may confirm that this source is indeed a cluster relic.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A781 - magnetic fields - large-scale structure of Universe

Nomenclature: Figs 2+4, Table 2: [GMG2011] A (Nos A-L), No. K missing.

Simbad objects: 17

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Number of rows : 17

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 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2495 2
2 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 346 0
3 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 519 0
4 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1266 1
5 ICRF J090933.4+425346 Sy2 09 09 33.49711097 +42 53 46.4818256   19.98 19.42 18.220   ~ 462 0
6 [GMG2011] A Rad 09 20 01.3 +30 34 05           ~ 1 0
7 [GMG2011] B Rad 09 20 08.3 +30 32 15           ~ 1 0
8 [GMG2011] C Rad 09 20 14.0 +30 29 00           ~ 1 0
9 [GMG2011] E Rad 09 20 21.9 +30 32 25           ~ 1 0
10 [GMG2011] D Rad 09 20 22.7 +30 29 45           ~ 1 0
11 ACO 781 ClG 09 20 25.4 +30 30 07           ~ 129 0
12 [VGD2008] J092032.2+302734.2 Rad 09 20 32.20 +30 27 34.2           ~ 2 0
13 [GMG2011] F Rad 09 20 48.6 +30 28 36           ~ 1 0
14 [GMG2011] G Rad 09 21 08.3 +30 29 26           ~ 1 0
15 [GMG2011] H Rad 09 21 12.7 +30 28 11           ~ 1 0
16 [GMG2011] I Rad 09 21 16.2 +30 30 31           ~ 1 0
17 [GMG2011] L Rad 09 21 22.2 +30 29 11           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-02:44:46

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