Supernova nucleosynthesis

Journal Article · Sun Feb 15 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.55171· OSTI ID:21182571

Hashimoto, M ^[1]; Nagataki, S ^[2]; Sato, K ^[2]; Yamada, S ^[2]

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1. Department of Physics, Faculty of Science, Kyushu University, Fukuoka 810 (Japan)
2. Department of Physics, School of Science, University of Tokyo, Tokyo 113 (Japan)

Nucleosynthesis in supernovae is reviewed considering the recent development. There is a consensus that supernovae have two distinct origins. One is the explosion of white dwarfs which we call SNIa. The other is the explosion of massive stars of M{sub ms} > or approx. 10M{sub {center_dot}} which we call SNII (M{sub ms} is the stellar mass in the main-sequence stage). However, the mechanism of the explosion for both supernovae is now in debate. SNIa is the result of the mass accretion onto a white dwarf from a companion star. The deflagration model which has been believed as the standard model of SNIa may be modified because many different types of SNIa have been observed recently. Furthermore, multi-dimensional hydrodynamical calculations suggest a slow deflagration model rather than a fast deflagration model like W7. On the other hand, to explain new types of SNIa, delayed or late detonation model has been proposed. For SNII, there does not still exist the reliable calculations from the core collapse to the explosion after a bounce; the present delayed explosion calculation cannot explain the observed explosion energy of SN1987A. Though these calculations are limited to the spherical cases, from the observation and multi-dimensional calculations, asymmetric explosion is suggested. Therefore, we must explore possible explosion models of supernovae for both SNIa and SNII. Recently, developed are two-dimensional hydrodynamical calculations to simulate an asymmetric explosive nucleosynthesis; we have found significant differences compared with the spherical explosive nucleosynthesis. For SNIa, new models of delayed detonation and results of the explosive nucleosynthesis was proposed by [9]. These new models are expected to compensate the previous models in many observational points.

• OSTI ID: 21182571
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 425; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
ELEMENT ABUNDANCE
MASS
NUCLEOSYNTHESIS
SPHERICAL CONFIGURATION
STAR ACCRETION
STAR MODELS
SUPERNOVAE
TWO-DIMENSIONAL CALCULATIONS
WHITE DWARF STARS