2007A&A...470L..25G


Query : 2007A&A...470L..25G

2007A&A...470L..25G - Astronomy and Astrophysics, volume 470, L25-28 (2007/8-2)

Discovery of diffuse radio emission at the center of the most X-ray-luminous cluster RX J1347.5-1145.

GITTI M., FERRARI C., DOMAINKO W., FERETTI L. and SCHINDLER S.

Abstract (from CDS):

We report on new VLA radio observations of the distant cluster RX J1347.5-1145, which is the most luminous in X-rays. We aim at investigating the possible presence of diffuse and extended radio emission in this very peculiar system which shows both a massive cooling flow and merging signatures. New low resolution (∼18arcsec) VLA radio observations of this cluster are combined with higher resolution (∼2arcsec) data available in the VLA archive. We discover the presence of a diffuse and extended (∼500kpc) radio source centered on the cluster, unrelated to the radio emission of the central AGN. The properties of the radio source, in particular a) its occurrence at the center of a massive cooling flow cluster, b) its total size comparable to that of the cooling region, c) its agreement with the observational trend between radio luminosity and cooling flow power, indicate that RX J1347.5-1145 hosts a radio mini-halo. We suggest that the radio emission of this mini-halo, which is the most distant object of its class discovered up to now, is due to electron re-acceleration triggered by the central cooling flow. However, we also note that the morphology of the diffuse radio emission shows an elongation coincident with the position of a hot subclump detected in X-rays, thus suggesting that additional energy for the electron re-acceleration might be provided by the submerger event.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: RX J1347.5-1145 - radiation mechanisms: non-thermal - galaxies: intergalactic medium - galaxies: cooling flows - acceleration of particles - radio continuum: galaxies

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2101 1
2 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 366 0
3 2MASX J07473129-1917403 BiC 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 399 1
4 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4077 2
5 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 503 0
6 QSO J1357-1527 QSO 13 57 11.2449596232 -15 27 28.783448712   18.13   18.40   ~ 134 1
7 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 714 0
8 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 652 2
9 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 227 0

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2022.07.01-08:52:59

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