A Radio Survey of Seven Southern X-ray Luminous Clusters of Galaxies
O.B. Slee (1), H. Andernach (2), V.J. McIntyre (1,3), G.S. Tsarevsky, (1,4) ((1) Australia Telescope National Facility, CSIRO, Australia, (2), Depto. de Astronomia, Univ. Guanajuato, Mexico, (3) School of Physics,, University of Sydney, Australia, (4) Astro Space Center

TL;DR
This study uses radio observations at multiple frequencies to survey seven X-ray luminous galaxy clusters, revealing differences in radio source populations compared to radio-selected samples, including an excess of flat-spectrum sources and absence of FR II galaxies.
Contribution
It provides the first comprehensive radio survey of these specific X-ray luminous clusters and compares their radio source properties with radio-selected cluster samples, highlighting notable differences.
Findings
X-ray clusters have more flat-spectrum radio sources.
The radio luminosity function for FR I sources is steeper in X-ray clusters.
No FR II radio galaxies are found in the X-ray selected sample.
Abstract
The Australia Telescope Compact Array (ATCA) has been used at 1.38 and 2.38 GHz to survey seven southern Abell clusters of galaxies with high X-ray luminosities: A2746, A2837, A3126, A3216, A3230, A3827 and A3836. The clusters have also been surveyed at 0.843 GHz with the Molonglo Observatory Synthesis Telescope (MOST). We have listed a complete 1.38-GHz sample of 149 radio sources within the Abell circles centred on their X-ray centroids. We compare their identification fractions, emitted 1.38-GHz and optical powers, radio spectral indices and radial variation in projected source density with those of the radio-selected samples of Slee et al. (1998). We compare our fractional radio luminosity function with that of the radio-selected samples of Ledlow and Owen (1996) and Slee et al. (1998). Three significant differences are noted between X-ray and radio-selected samples of clusters; (1)…
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