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For refcode 1989AJ.....98...64Z:
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1989AJ.....98...64Z A 20 cm VLA SURVEY OF ABELL CLUSTERS OF GALAXIES. I. DISTANCE CLASS <=3 CLUSTERS JUN-HUI ZHAO AND JACK O. BURNS Institute of Astrophysics, Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 FRAZER N. OWEN National Radio Astronomy Observatory, P.O. Box O, Socorro, New Mexico 87801 Received 11 July 1988; revised 30 March 1989 ABSTRACT We report the results of a VLA survey at 20 cm of a complete sample of nearby Abell clusters (D<=3). We have compiled an extensive catalog of cluster radio sources with S_20_ > 10 mJy from a combination of our VLA observations and observations of similar resolution with the Westerbork Synthesis Radio Telescope (WSRT). Using these radio data and x-ray data from the Einstein observatory, we have analyzed the properties of these clusters. Unlike that previously suggested, no significant correlation is found between 20 cm radio power and x-ray luminosity. There is weak evidence that richer clusters have a higher probability of radio emission. Based on Rood-Sastry morphological types of clusters, we do not find any strong evidence that regular-type clusters are statistically more likely to be radio loud than irregular-type clusters. However, Bautz-Morgan types I and II-III are found to have comparable radio-detection rates; but Bautz-Morgan Type III clusters are likely to have a lower radio-detection rate. A weak correlation between x-ray-cooling mass-accretion rates and radio powers was found for central, dominant galaxies in cooling-flow clusters. This might suggest that either cooling accretion directly fuels the central engine and/or cooling flows strongly interact with (e.g., confine) the radio plasma. In addition, radio sources associated with central dominant galaxies in cooling-flow clusters tend to be small in comparison with those in non-cooling-flow clusters. This might suggest that cooling flows tend to obstruct the propagation of radio jets from central, dominant galaxies.
Retrieve 315 NED objects in this reference.
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