Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pazh...15...99u&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 15, Feb. 1989, p. 99-108. In Russian. In Russian. In Russian.
Astronomy and Astrophysics
Astrophysics
2
Cooling Flows (Astrophysics), Magellanic Clouds, Stellar Evolution, Supergiant Stars, Supernova 1987A, Abundance, Astronomical Models, Bolometers, Chemical Composition, Density Distribution, Light Curve
Scientific paper
The dependence of the bolometric light curve and of the effective temperature on the density distribution in a progenitor, its chemical composition, mass, radius, and explosion energy is studied. It is shown that, just before the supernova 1987 A outburst, the outside layers of the blue supergiant SK-69.202 deg had a density distribution similar to that of the polytropic model with an index of n = 3, a chemical composition with a mass fraction of hydrogen of the order of 0.1 and a relative helium abundance of about 0.9.
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