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2000MNRAS.314..594V - Mon. Not. R. Astron. Soc., 314, 594-610 (2000/May-3)
Radio properties of the Shapley Concentration - III. Merging clusters in the A3558 complex.
VENTURI T., BARDELLI S., MORGANTI R. and HUNSTEAD R.W.
Abstract (from CDS):
We found that the radio source counts in the A3558 complex are consistent with the background source counts. The much higher optical density compared with the background is not reflected as a higher density of radio sources. 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 for cluster early-type galaxies and for those not selected to be in clusters at radio powers logP1.4≳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. Possible explanations will be presented.
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 SC 1329-313, i.e. a candidate radio halo at the centre of A3562 and low brightness extended emission around a 14.96-mag Shapley galaxy. The relation between these two extended galaxies and the ongoing group merger in this region of the Shapley Concentration are discussed.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A3556 - galaxies: clusters: individual: A3558 - galaxies: clusters: individual: A3562 - galaxies: clusters: individual: SC 1329-313 (read: SC 1327-31.3) - radio continuum: galaxies
Nomenclature: Table 3: [VBM2000] JHHMM-DDMMa N=157.
Simbad objects: 163