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Radio Observations of Supernova 1987A

Published online by Cambridge University Press:  29 January 2014

L. Staveley-Smith ,
T. M. Potter ,
G. Zanardo ,
B. M. Gaensler  and
C.-Y. Ng
L. Staveley-Smith
Affiliation:
International Centre for Radio Astronomy Research, University of Western Australia, Crawley, WA 6009, Australia email: [email protected] ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
T. M. Potter
Affiliation:
International Centre for Radio Astronomy Research, University of Western Australia, Crawley, WA 6009, Australia email: [email protected]
G. Zanardo
Affiliation:
International Centre for Radio Astronomy Research, University of Western Australia, Crawley, WA 6009, Australia email: [email protected]
B. M. Gaensler
Affiliation:
ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) Sydney Institute of Astronomy, School of Physics, The University of Sydney, NSW 2006, Australia
C.-Y. Ng
Affiliation:
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong
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Abstract

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Supernovae and their remnants are believed to be prodigious sources of Galactic cosmic rays and interstellar dust. Understanding the mechanisms behind their surprisingly high production rate is helped by the study of nearby young supernova remnants. There has been none better in modern times than SN1987A, for which radio observations have been made for over a quarter of a century. We review extensive observations made with the Australia Telescope Compact Array (ATCA) at centimetre wavelengths. Emission at frequencies from 1 to 100 GHz is dominated by synchrotron radiation from an outer shock front which has been growing exponentially in strength from day 3000, and is currently sweeping around the circumstellar ring at about 4000 km s−1. Three dimensional models of the propagation of the shock into the circumstellar medium are able to reproduce the main observational features of the remnant, and their evolution. We find that up to 4% of the electrons encountered by the shock are accelerated to relativistic energies. High-frequency ALMA observations will break new ground in the understanding of dust and molecule production.

Keywords

SupernovaeSN1987Aradio astronomy
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 15 - 22
Copyright
Copyright © International Astronomical Union 2014 

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