Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-01-14
Astronomy and Astrophysics
Astrophysics
18 pages, 14 figures. Accepted for publication on MNRAS
Scientific paper
10.1046/j.1365-8711.2000.03403.x
We present the results of a 22 cm radio survey carried out with the A3558 complex, a chain formed by the merging ACO clusters A3556-A3558-A3562 and thetwo groups SC1327-312 and SC1323-313, located in the central region of the complex, a chain formed by the merging ACO clusters A3556-A3558-A3562 and the two groups SC1327-312 and SC1323-313, located in the central region of the Shapley Concentration. The purpose of our survey is to study the effects of cluster mergers on the statistical properties of radio galaxies and to investigate the connection between mergers and the presence of radio halos and relic sources. We found that the radio source counts in the A3558 complex are consistent with the background source counts. Furthermore, we found that no correlation exists between the local density and the radio source power, and that steep spectrum radio galaxies are not segregated in denser optical regions. The radio luminosity function for elliptical and S0 galaxies is significantly lower than that for cluster type galaxies and for those not selected to be in clusters at radio powers logP(1.4) > 22.5, implying that the probability of a galaxy becoming a radio source above this power limit is lower in the Shapley Concentration compared with any other environment. The detection of a head-tail source in the centre of A3562, coupled with careful inspection of the 20 cm NRAO VLA Sky Survey (NVSS) and of 36 cm MOST observations, allowed us to spot two extended sources in the region between A3562 and SC1329-313, i.e. a candidate radio halo at the centre of A3562, and low brightness extended emission around a 14.96 magnitude Shapley galaxy.
Bardelli Sandro
Hunstead Richard W.
Morganti Rafaella
Venturi Tiziana
No associations
LandOfFree
Radio Properties of the Shapley Concentration. III. Merging Clusters in the A3558 Complex does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Radio Properties of the Shapley Concentration. III. Merging Clusters in the A3558 Complex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio Properties of the Shapley Concentration. III. Merging Clusters in the A3558 Complex will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-698142