Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..522..161r&link_type=abstract
COSMIC EXPLOSIONS: Tenth Astrophysics Conference. AIP Conference Proceedings, Volume 522, pp. 161-164 (2000).
Astronomy and Astrophysics
Astrophysics
Supernovae, Radiation Mechanisms, Polarization
Scientific paper
Supernova 1993 J exploded in the nearby spiral galaxy M81. Its initial spectrum contained hydrogen lines and therefore it was classified as a Type II supernova. However, subsequent disappearance of hydrogen lines and appearance of helium lines made it similar to a type Ib supernova. Radio emission was detected from SN 1993 J shortly after the first peak in optical brightness. In this paper we present a model for the observed radio radiation that involves the interaction of a collisionless shock front generated by the supernova ejecta and a stellar wind produced by the progenitor supergiant. We discuss electron acceleration, magnetic field generation and interpret an observed break in the radio spectrum. .
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