2005/03/24 by A. Omar, K. S. Dwarakanath · 1 citation
Physics and Astronomy · #astro-ph
paper · pdf · doi:10.1007/bf02702453
16 pages; Accepted for publication in Journal of Astroph. & Astron. March, 2005
arxiv created 2005/03/24 · arxiv updated 2009/12/01
The Eridanus galaxies follow the well-known radio-FIR correlation. Majority (70%) of these galaxies have their star formation rates below that of the Milky Way. The galaxies having a significant excess of radio emission are identified as low luminosity AGNs based on their radio morphologies obtained from the GMRT observations. There are no powerful AGNs (L20cm > 1023 W Hz-1) in the group. The two most far-infrared and radio luminous galaxies in the group have optical and HI morphologies suggestive of recent tidal interactions. The Eridanus group also has two far-infrared luminous but radio-deficient galaxies. It is believed that these galaxies are observed within a few Myr of the onset of an intense star formation episode after being quiescent for at least a 100 Myr. The upper end of the radio luminosity distribution of the Eridanus galaxies (L20cm ~ 1022 W Hz-1) is consistent with that of the field galaxies, other groups, and late-type galaxies in nearby clusters.