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2nd of March 2017
Supernova SN1987A: 30 years since discovery - Part II
by Dick Manchester (CASS)
About three years after the initial burst, radio emission was again detected from SN1987A, first at Molonglo and then a few weeks later at the Australia Telescope Compact Array (ATCA). Since then, the flux density has climbed, initially rapidly and then since about 1996, almost exponentially with time constant about 2500 days at all frequencies (Zanardo et al. 2010, ApJ, 710, 1515). This emission originates from shock acceleration of electrons by interaction of the expanding ejecta with the circumstellar gas and signals the birth of a radio supernova remnant.

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