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Instabilities and clumping in SN 1987A. I - Early evolution in two dimensions
Fryxell, Bruce; Mueller, Ewald; Arnett, David
AA(Steward Observatory; Arizona, University, Tucson, AZ), AB(Steward Observatory; Arizona, University, Tucson, AZ), AC(Max-Planck-Institut für Physik und Astrophysik, Garching bei München, Germany)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Feb. 1, 1991, p. 619-634. (ApJ Homepage)
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NASA/STI Keywords:
Stellar Evolution, Stellar Interiors, Supernova 1987a, Abundance, Light Curve, Shock Waves, Stellar Mass, Stellar Models, Two Dimensional Models
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This paper presents new calculations of instabilities, mixing, and clumping in the ejecta of SN 1987A, which are an extension of calculations published of Arnett et al. (1989) and which make it possible to differentiate between physical and numerical effects. It is shown that perturbations of physically reasonable amplitude provide sufficient mixing and clumping to explain the earlier than expected observations of X-rays and gamma rays and the shape of the SN 1987A light curve. It is also shown that the degree of clumping also affects estimates of mass from modeling the light curves of SN Ib.

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