Journal Article

A study of the environments of large radio galaxies using SDSS

A. Pirya, D. J. Saikia, M. Singh and H. C. Chandola

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 426, issue 1, pages 758-763
Published in print October 2012 | ISSN: 0035-8711
Published online October 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21656.x
A study of the environments of large radio galaxies using SDSS

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Abstract

The distributions of galaxies in the environments of 16 large radio sources have been examined using the Sloan Digital Sky Survey (SDSS). In the giant radio galaxy J1552+2005 (3C 326) which has the highest arm-length ratio, the shorter arm is found to interact with a group of galaxies which forms part of a filamentary structure. Although most large sources occur in regions of low galaxy density, the shorter arm is brighter in most cases suggesting asymmetries in the intergalactic medium which may not be apparent in the distribution of galaxies. In two cases with strong and variable cores, J0313+4120 and J1147+3501, the large flux density asymmetries are possibly also caused by the effects of relativistic motion.

Keywords: galaxies: groups: general; galaxies: jets; cosmology: observations; large scale structure of Universe; radio continuum: galaxies

Journal Article.  2181 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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