Accreting white dwarf models for type I supernovae. III. Carbon deflagration supernovae

Journal Article · Thu Nov 15 04:00:00 EST 1984 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/162639· OSTI ID:5838082

Nomoto, K; Thielemann, F; Yokoi, K

The carbon deflagration models in accreting C+O white dwarfs are presented as a plausible model for Type I supernovae. The evolution of the white dwarf is calculated from the beginning of accretion. The relatively rapid accretion studied here (M> or approx. =4 x 10/sup -8/ M/sub sun/ yr/sup -1/) leads to the initiation of the carbon deflagration at the center. Subsequent propagation of the convective carbon deflagration wave and associated explosive nucleosynthesis are calculated for several cases of mixing length in the convection theory. The deflagration wave synthesizes 0.5-0.6 M/sub sun/ /sup 56/Ni in the inner layer of the star; this amount is sufficient to power the light curve of Type I supernovae by the radioactive decays of /sup 56/Ni and /sup 56/Co. In the outer layers, substantial amount of intermediate mass elements, Ca, Ar, S, Si, Mg, and O are synthesized in the decaying deflagration wave; this is consistent with the spectra of Type I supernovae near maximum light. As a result of large nuclear energy release, the star is disrupted completely, leaving no compact star remnant behind. Thus the carbon deflagration model can account for many of the observed features of Type I supernovae.

• Research Organization: Department of Earth Science and Astronomy, College of Arts and Sciences, University of Tokyo
• OSTI ID: 5838082
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 286:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON
CHEMICAL COMPOSITION
DWARF STARS
ELEMENTS
ERUPTIVE VARIABLE STARS
FLUID MECHANICS
HYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
NONMETALS
NUCLEOSYNTHESIS
OXYGEN
STAR ACCRETION
STAR EVOLUTION
STAR MODELS
STARS
SUPERNOVAE
SYNTHESIS
VARIABLE STARS
WAVE PROPAGATION
WHITE DWARF STARS