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Date and Time of the Query: 2019-06-24 T13:02:51 PDT
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For refcode 1992ApJ...386L..13S:
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1992ApJ...386L..13S POSSIBLE MODELS FOR THE TYPE Ia SUPERNOVA 1990N TOSHIKAZU SHIGEYAMA Max-Planck-Institut fur Astrophysik, D8046 Garching bei Munchen, Germany KEN'ICHI NOMOTO AND HITOSHIHI YAMAOKA Department of Astronomy, Faculty of Science, University of Tokyo, Tokyo 113, Japan AND FRIEDRICH-KARL THIELEMANN Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 Received 1991 August 20; accepted 1991 November 26 ABSTRACT Possible interpretations of new spectral and photometric features of Type Ia supernova 1990N with carbon deflagration/detonation models are presented. To explain the presence of Si and Ca at high expansion velocities in SN 1990N, we suggest four possible models, among which is a carbon detonation in a white dwarf with a mass ~1 M_sun_. The slow rise of the light curve of SN 1990N can be reproduced by both the deflagration and detonation models if the optical opacity is somewhat larger than that previously adopted. Implications for the Hubble constant are discussed. Subject headings: galaxies: distances and redshifts - nuclear reactions, nucleosynthesis, abundances - stars: individual (SN 1990N) - supernovae: individual (SN 1990N) - white dwarfs
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