Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..466w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 466-489. Research supported by the Lawrence Livermore
Astronomy and Astrophysics
Astrophysics
183
Blue Stars, Stellar Evolution, Stellar Luminosity, Supergiant Stars, Supernova 1987A, Temporal Distribution, Light Curve, Line Spectra, Stellar Mass, Stellar Spectrophotometry
Scientific paper
The explanation of the behavior of the SN 1987A explosion, offered upon its discovery on February 23.316 UT, and predictions on the possible course of its continued evolution, made by Woosley et al. (1987) are discussed in the light of new, definite calculations and reevaluation of the earlier contentions. A number of properties of the SN 1987A strongly constrain the progenitor to be a blue supergiant in the mass range 12-30 solar masses. Two possible reasons for a blue presupernova star are discussed in detail: mass loss and low metallicity. Optical, hard X-ray, and gamma-ray curves were considered for several models consistent with observations. The best fit to the optical data was obtained using a 15-20 solar mass model that has lost about half of its mass prior to expoloding. The recent brightening indicates that the supernova has entered a state where radioactivity is the dominant source of power for the optical display.
Ensman Lisa
Pinto Philip A.
Woosley Stan E.
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