NASA/IPAC EXTRAGALACTIC DATABASE
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For refcode 1994MNRAS.268..203C:
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NED Abstract

Copyright by Royal Astronomical Society. 1994MNRAS.268..203C Radio continuum observations of starburst galaxies P. M. Collison, D. J. Saikia, A. Pedlar, D. J. Axon, and S. W. Unger Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfleld, Cheshire SKII 9DL Department of Physics, Nuclear Physics Laboratory, Keble Road, Oxford OXI 3RH National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Post Bag 3, Ganeshkhind, Pune 411007, India Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland, USA Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ Accepted 1993 December 10. Received 1993 September 24 ABSTRACT We present radio continuum observations with the VLA at 3.6 and 6 cm and with MERLIN at 18 cm of a sample of mildly active galaxies, including the archetypal starburst galaxies NGC 1808 and 253, both of which have a large number of compact radio components. These observations were made to estimate the spectral indices and brightness temperatures of these features, which could help to clarify the nature of the radio emission. The spectral indices of all the prominent compact components in NGC 1808, and of the five outside the central plateau of emission in NGC 253, are consistent with them being supernova remnants. We discuss some of the properties of these compact radio components and the possible supernova rate in their parent galaxies. We also report the results of our search for compact radio components in the remaining sources of our sample. Key words: supernovae remnants - galaxies: individual: NGC 253 - galaxies: individual: NGC 1808 - galaxies: Seyfert - galaxies: starburst - radio continuum: galaxies.
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