Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249...35h&link_type=abstract
Astrophysical Journal, Part 1, vol. 249, Oct. 1, 1981, p. 35-39.
Astronomy and Astrophysics
Astronomy
5
Galactic Clusters, Heao 1, Radio Sources (Astronomy), Spaceborne Astronomy, X Ray Sources, Bremsstrahlung, Galactic Radiation, Intergalactic Media, Luminosity, Thermal Radiation
Scientific paper
Burns and Owen's sample of 25 4C radio sources which coincide with Zwicky clusters of galaxies has been searched for X-ray emission using the HEAO 1 A-2 experiment. X-ray emission was detected from five sources at the 3sigma level, two of which exceeded 5sigma. Positions and 90% X-ray error boxes are given for each of the five sources detected. The clusters surveyed are non-Abell clusters which would generally not be expected to be detectable with the A-2 experiment. The search for X-ray emission was prompted by the knowledge of the existence of extended radio sources in the clusters. The relaxed structure of these sources implies the presence of a relatively dense intracluster medium which is expected to produce thermal bremsstrahlung X-ray emission.
Holman Gordon D.
McKee J. D.
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