Supernova 1987K - Type II in youth, type Ib in old age

Details Supernova 1987K - Type II in youth, type Ib in old age Supernova 1987K - Type II in youth, type Ib in old age

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1941f&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Dec. 1988, p. 1941-1948. Research supported by the University of California.

Astronomy and Astrophysics

Astronomy

119

Stellar Spectrophotometry, Supernovae, Brightness Distribution, Emission Spectra, H Alpha Line, Light Curve, Stellar Winds, Supermassive Stars

Scientific paper

Spectra of SN 1987K in NGC 4651 have been obtained 0-2 weeks past maximum brightness and 5-7 weeks past maximum. The results suggest that SNe II and at least some SNe Ib are closely related objects, and that SN 1987A could have been a massive star which lost a majority of its hydrogen prior to exploding. It is proposed that SN 1987A belongs to a new subclass, type IIb, of SN that have the spectral characteristics of type II near maximum brightness and those of type Ib long past maximum.

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