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A Search for Radio-loud Supernovae

Published online by Cambridge University Press:  16 May 2016

Elaine M. Sadler  and
Duncan Campbell-Wilson
Elaine M. Sadler
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australiaems@physics.usyd.edu.au
Duncan Campbell-Wilson
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australiaems@physics.usyd.edu.au
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Abstract

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Some extragalactic supernovae, such as SN 1986J in NGC 891 (Rupen et al. 1987), are unusually strong radio sources. Their radio emission typically peaks a few years after the supernova explodes, and appears to arise from the interaction of the supernova shock with a dense stellar wind shed by the progenitor star. Since two radio-loud and possibly optically faint supernovae have recently been found serendipitously in nearby spiral galaxies, it is possible that such objects are common. If so, this would have important consequences for our understanding of both the chemical enrichment history of galaxies and the radio emission from starburst galaxies. Preliminary results from a survey of nearby spiral galaxies with the Molonglo Observatory Synthesis Telescope (MOST) allow us to make a first estimate of the radio supernova rate. A larger study now in progress will provide a much more sensitive measurement.

Keywords

Supernovae: generalsurveysradio sources: variableradio sources: galaxies
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 14 , Issue 2 , 1997 , pp. 159 - 163
Copyright
Copyright © Astronomical Society of Australia 1997

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