Evidence for an extensive intracluster medium from radio observations of distant Abell clusters

Details Evidence for an extensive intracluster medium from radio observations of distant Abell clusters Evidence for an extensive intracluster medium from radio observations of distant Abell clusters

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1407h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Aug. 1985, p. 1407-1412.

Astronomy and Astrophysics

Astronomy

6

Extragalactic Radio Sources, Galactic Clusters, Intergalactic Media, Radio Astronomy, Radio Galaxies, Astronomical Maps, Galactic Structure, Mass Distribution, X Ray Sources

Scientific paper

Observations have been made of 18 distance class 5 and 6 Abell clusters of galaxies using the VLA in its 'C' configuration at a frequency of 1460 MHz. Half of the clusters in the sample are confirmed or probable sources of X-ray emission. All the detected radio sources with flux densities above 10 mJy are reported, and information is provided concerning the angular extent of the sources, as well as the most likely optical identification. The existence of an extensive intracluster medium is inferred by identifying extended/distorted radio sources with galaxies whose apparent magnitudes are consistent with their being cluster members and that are at projected distances of 3-4 Abell radii (6-8 Mpc) from the nearest cluster center. By requiring that the radio sources are confined by the ambient medium, the ambient density is calculated and the total cluster mass is estimated. As a sample calculation, a wide-angle-tail radio source some 5 Mpc from the center of Abell 348 is used to estimate these quantities.

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