High-sensitivity radio observations of the Coma cluster of galaxies

Details High-sensitivity radio observations of the Coma cluster of galaxies High-sensitivity radio observations of the Coma cluster of galaxies

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1381v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, May 1990, p. 1381-1396.

Astronomy and Astrophysics

Astronomy

38

Galactic Clusters, Radio Astronomy, Radio Emission, Radio Galaxies, Brightness Distribution, Charge Coupled Devices, Elliptical Galaxies, Radio Telescopes, Spiral Galaxies, Very Large Array (Vla)

Scientific paper

Radio observations of the Coma cluster of galaxies, performed at 326 MHz with the Westerbork Synthesis Radio Telescope and at 1.4 GHz with the Very Large Array, are presented. Of the 31 radio-emitting galaxies identified, 29 belong to the Coma cluster. Detailed maps are given of the extended low-brightness structures present in the Coma cluster, i.e., the central halo source Coma C and the peripheral extended source 1253 + 275. A very low brightness bridge connecting them is revealed for the first time. CCD images are presented for 11 radio-emitting galaxies, and optical core radii are derived for the ellipticals and cDs. It is found that the probability of forming radio-emitting E galaxies is not related to their radial distance, while S galaxies within 0.5 R(A) of the center have a larger probability of showing radio activity. A statistical analysis of the spectral index distribution of the field radio sources is performed to search for steep-spectrum sources.

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