Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..992n&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, Sept.-Oct. 1976, p. 992-1005. In Russian.
Astronomy and Astrophysics
Astronomy
12
Stellar Envelopes, Stellar Mass Ejection, Stellar Models, Stellar Temperature, Supernovae, Equations Of State, Light Curve, Radiation Distribution, Saha Equations, Stellar Luminosity, Temperature Distribution
Scientific paper
Supernova models are constructed on the assumption of slow (nonexplosive) energy extraction in an inner spherical layer. Total mass of the star is 1.7 solar masses, mass of the ejected shell is 0.4 solar mass, and the chemical composition is pure helium. Total extracted energy is (0.3-1) times 10 to the 51st ergs, and the velocity of the ejected shell is of the order of 6,000-13,000 km/sec. At maximum brightness the shell has the structure of a thin spherical layer several solar radii thick, while the radius of the photosphere is of the order of 10,000 solar radii. Shell density is about 10 to the minus 10th g/cu cm, its temperature is about 20,000 K, and the helium is singly ionized. The shell is highly turbulent on account of the Rayleigh-Taylor instability. Calculated light curves are in qualitative agreement with observed ones for SN I in the maximum brightness region.
Nadezhin D. V.
Utrobin Victor P.
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