Models for type IA supernovae with composition inversions

Abstract

view Abstract Citations (8) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Models for Type IA Supernovae with Composition Inversions Wheeler, J. Craig ; Swartz, Douglas ; Li, Zong-Wei ; Sutherland, Peter G. Abstract Hydrodynamic models of type Ia supernovae are calculated which may correspond to certain possible outcomes of the evolution of binary systems which contain two degenerate white dwarfs. It is found that, unless the outer mantle is highly depleted in C, the detonation of a helium core within a C/O mantle results in a virtually complete incineration of the star, with no intermediate mass elements, at velocities of about 10,000 km/s. A mantle of O/Ne/Mg on a He core burns only to the Si peak but leaves insufficient carbon-burning product to be consistent with type Ia supernovae. For deflagrating models with a C/O core and mantle of O/Ne/Mg, it is found that if the C/O core mass is less than some limit between 0.5 and 0.9 solar mass, insufficient thermonuclear energy is released, resulting in velocities too small to correspond to observed type Ia supernovae. Publication: The Astrophysical Journal Pub Date: May 1987 DOI: 10.1086/165238 Bibcode: 1987ApJ...316..733W Keywords: Binary Stars; Stellar Composition; Stellar Models; Supernovae; White Dwarf Stars; Carbon; Helium; Hydrodynamics; Oxygen; Stellar Cores; Stellar Mass Accretion; Astrophysics; HYDRODYNAMICS; STARS: BINARIES; STARS: INTERIORS; STARS: SUPERNOVAE; STARS: WHITE DWARFS full text sources ADS |