Radio sources in dense groups

Menon, T. K. ; Hickson, P. (1985) Radio sources in dense groups The Astrophysical Journal, 296 . pp. 60-64. ISSN 0004-637X

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In order to investigate effects of galaxy environment on radio emission, we have observed 88 compact groups of galaxies, with densities as high as 106 galaxies Mpc-3, at a wavelength of 18 cm at the VLA. Forty- one sources were found above a flux limit of 1.5 mJy, with roughly equal frequency in all galaxy types. Elliptical galaxies with detectable radio emission are almost always the first-ranked galaxies in optical luminosity. They are less luminous than typical rich cluster radio galaxies, are coincident with the optical nucleus, and do not show extended structure. Radio sources occurring in spiral galaxies show no strong preference for optical rank. It is argued that this is strong evidence that the galaxy environment on large scales plays a crucial role in the development and fueling of nuclear radio sources.

Item Type:Article
Source:Copyright of this article belongs to American Astronomical Society.
Keywords:Galactic Clusters; Galactic Structure; Radio Sources (astronomy); Elliptical Galaxies; Galactic Nuclei; Spiral Galaxies
ID Code:75480
Deposited On:27 Dec 2011 13:40
Last Modified:18 May 2016 19:29

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