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Radio-Excess IRAS Galaxies: Low Power CSS/GPS Sources?

Published online by Cambridge University Press:  05 March 2013

Catherine L. Drake
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia. cdrake@mso.anu.edu.au, peter@mso.anu.edu.au, geoff@mso.anu.edu.au, mad@mso.anu.edu.au Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia.
Peter J. McGregor
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia. cdrake@mso.anu.edu.au, peter@mso.anu.edu.au, geoff@mso.anu.edu.au, mad@mso.anu.edu.au
Geoffrey V. Bicknell
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia. cdrake@mso.anu.edu.au, peter@mso.anu.edu.au, geoff@mso.anu.edu.au, mad@mso.anu.edu.au
Michael A. Dopita
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia. cdrake@mso.anu.edu.au, peter@mso.anu.edu.au, geoff@mso.anu.edu.au, mad@mso.anu.edu.au
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Abstract

Amongst our sample of radio-excess IRAS galaxies, we have identified compact steep spectrum radio sources that fall into the classes of CSS or GPS sources, but have not previously been identified as such. The sample includes objects that have radio powers as low as ˜1022 W Hz−1. We suggest that these are low-power analogues of CSS and GPS sources, with weaker radio jets. These may be precursors to FR I radio galaxies or may ‘fade’ into radio-quiet galaxies.

Type
GPS/CSS Workshop
Copyright
Copyright © Astronomical Society of Australia 2003

References

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