The Radio Evolution of SN1987A

Details The Radio Evolution of SN1987A The Radio Evolution of SN1987A

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..937...96s&link_type=abstract

SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters. AIP Conference Proceedings, Volume 937, pp. 96-101 (2007).

Computer Science

5

Supernovae, Supernova Remnants, Mass Loss And Stellar Winds, Radio, Microwave

Scientific paper

The results of 20 years of monitoring of the evolution of the radio flux density from SN1987A are described. Following a prompt radio outburst, no radio flux was detectable from SN1987A until 1990. Since then, there has been a gradual increase in the flux density at all frequencies (the 1.4 GHz flux density at the beginning of 2007 was 0.32 Jy) and a gradual flattening of its spectral index to the current value of α = -0.75(S~να). The remnant is now bright enough to detect, via HI absorption, components of the foreground interstellar medium not seen since ultraviolet observations shortly after the explosion. Nevertheless, SN1987A remains spectacularly underluminous in the radio compared with more distant radio supernovae detected by existing radio telescopes.

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