2003A&A...402..913V


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.22CEST07:46:32

2003A&A...402..913V - Astronomy and Astrophysics, volume 402, 913-920 (2003/5-2)

The radio halo in the merging cluster A3562.

VENTURI T., BARDELLI S., DALLACASA D., BRUNETTI G., GIACINTUCCI S., HUNSTEAD R.W. and MORGANTI R.

Abstract (from CDS):

We present new VLA observations at 1.4GHz confirming the presence of a radio halo at the centre of the cluster A3562, in the core of the Shapley Concentration. We also report a detailed multifrequency radio study of the head tail galaxy J1333-3141, which is completely embedded in the halo emission. The radio halo has an irregular shape, and a maximum linear size of ∼620kpc, which is among the smallest found in the literature. The source has a steep spectrum, i.e. α843MHz1.4GHz∼2, and its total radio power, P1.4GHz∼2x1023W/Hz, is the lowest known to date. The radio power of the halo and the X-ray parameters of the cluster, such as LX and kT, nicely fit the correlations found in the literature for the other halo clusters, extending them to low radio powers. We found that the total number of electrons injected in the cluster environment by the head-tail source is enough to feed the halo, if we assume that the galaxy has been radio active over a large fraction of its crossing time. We discuss possible origins of the radio halo in the light of the two-phase model (Brunetti et al., 2001MNRAS.320..365B) and propose that the observed scenario is the result of a young source at the beginning of the reacceleration phase.

Abstract Copyright:

Journal keyword(s): radio continuum: galaxies - galaxies: clusters: general - galaxies: clusters: individual: A3562 - galaxies: intergalactic medium

Simbad objects: 8

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Number of rows : 8

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 1300 ClG 11 32 00.7 -19 53 34           ~ 132 0
2 NGC 4869 rG 12 59 23.331 +27 54 41.81 15.03 14.9 13.52 13.292 12.536 ~ 261 0
3 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4242 2
4 NAME SHAPLEY-CENTAURUS CL SCG 13 06.0 -33 04           ~ 510 0
5 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 408 2
6 2MASX J13333164-3140589 rG 13 33 31.641 -31 40 58.91   17.33   15.39   ~ 11 0
7 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 285 1
8 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 781 1

    Equat.    Gal    SGal    Ecl

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2020.09.22-07:46:32

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