The p-Process in the Carbon Deflagration Model for Type Ia Supernovae and Chronology of the Solar System Formation

Journal Article · Wed Jul 12 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2234446· OSTI ID:20877461

Kusakabe, Motohiko ^[1]; Iwamoto, Nobuyuki ^[2]; Nomoto, Ken'ichi ^[1]

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1. Department of Astronomy, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
2. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)

We study nucleosynthesis of p-nuclei in the carbon deflagration model for Type Ia supernovae (SNe Ia) by assuming that seed nuclei are produced by the s-process in accreting layers on a carbon-oxygen white dwarf during mass accretion from a binary companion. We find that about 50 % of the p-nuclides are synthesized in proportion to the solar abundance and that p-isotopes of Mo and Ru which are significantly underproduced in Type II supernovae (SNe II) are produced up to a level close to other p-nuclei. Comparing the yields of iron and p-nuclei in SNe Ia we find that SNe Ia can contribute to the galactic evolution of the p-nuclei. Next, we consider nucleochronology of the solar system formation by using four radioactive nuclides and apply the result of the p-process nucleosynthesis to simple galactic chemical evolution models. We find that when assumed three phases of interstellar medium are mixed by the interdiffusion with the timescale of about 40 Myr 53Mn/55Mn value in the early solar system is consistent with a meteoritic value. In addition, we put constraints to a scenario that SNe Ia induce the core collapse of the molecular cloud, which leads to the formation of the solar system.

• OSTI ID: 20877461
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 847; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON
ELEMENT ABUNDANCE
MANGANESE 53
MANGANESE 55
NUCLEAR REACTION YIELD
NUCLEOSYNTHESIS
OXYGEN
S PROCESS
SOLAR SYSTEM
SUPERNOVAE
WHITE DWARF STARS