Other
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382..108c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Nov. 20, 1991, p. 108-114.
Other
13
Interacting Galaxies, Radio Galaxies, Galactic Clusters, Radio Emission, Very Large Array (Vla)
Scientific paper
The distinctive system 3C 442, a source associated with two galaxies, NGC 7236/7237, is investigated with VLA at 6, 20, and 90 cm. The image of the radio source shows a mass of filaments and diffuse emission surrounding the two galaxies. The properties of this source are similar to a few other well-studied systems, all of which are associated with binary galaxies and some of which also show evidence for mergers. It is proposed that the usual morphology of 3C 442 is due to a galactic merger in the process. The high ellipticity of the cluster of galaxies in which NGC 7236/7237 are imbedded suggests that they may be the central galaxies in a pair of merging clusters. It is argued that the collimated gas was produced by a previously existing radio galaxy whose radio source was disrupted by the gravitational influence of the merger on the gas surrounding the source. The large-scale structure of 3C 442 is the result of these electrons interacting with the hot gas of the disturbed intracluster medium, and thereby becoming trapped in the debris of the merger.
Comins Neil F.
Owen Frazer N.
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