Late detonation models for the type IA supernovae SN 1991T and SN 1990N

Abstract

view Abstract Citations (99) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Late Detonation Models for the Type IA Supernovae SN 1991T and SN 1990N Yamaoka, Hitoshi ; Nomoto, Ken'ichi ; Shigeyama, Toshikazu ; Thielemann, Friedrich-Karl Abstract We present hydrodynamical models of exploding white dwarf's to account for the newly observed premaximum features of Type Ia supernovae 1990N and 1991T in a unified manner. In these models, a carbon deflagration, producing a central Fe/Co/Ni core and an intermediate Si/S/Ca layer, is later transformed into a detonation in the outermost layer. Depending on the transition density, the nucleosynthesis in such late detonations results in the formation of Fe-dominated surface layers or Si/Fe-rich surface layers, which are qualitatively consistent with the inferred composition of SN 1991T and 1990N, respectively. Publication: The Astrophysical Journal Pub Date: July 1992 DOI: 10.1086/186450 Bibcode: 1992ApJ...393L..55Y Keywords: Detonation; Nuclear Fusion; Stellar Models; Supernovae; White Dwarf Stars; Brightness Distribution; Hydrodynamic Equations; Surface Layers; Astrophysics; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; STARS: SUPERNOVAE: GENERAL; STARS: SUPERNOVAE: INDIVIDUAL ALPHANUMERIC: SN 1990N; STARS: SUPERNOVAE: INDIVIDUAL ALPHANUMERIC: SN 1991T; STARS: WHITE DWARFS full text sources ADS | data products NED (4) SIMBAD (2)