RADIOGENIC p-ISOTOPES FROM TYPE Ia SUPERNOVA, NUCLEAR PHYSICS UNCERTAINTIES, AND GALACTIC CHEMICAL EVOLUTION COMPARED WITH VALUES IN PRIMITIVE METEORITES

被引：39

作者：

Travaglio, C. ^{[1
,2
]}

Gallino, R. ^{[2
,3
]}

Rauscher, T. ^{[4
,5
]}

Dauphas, N. ^{[6
,7
]}

Roepke, F. K. ^{[8
]}

Hillebrandt, W. ^{[9
]}

机构：

[1] INAF Astrophys Observ Turin, I-10025 Turin, Italy

[2] B2FH Assoc, I-10025 Turin, Italy

[3] Univ Turin, Dipartimento Fis, I-10125 Turin, Italy

[4] Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[5] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[6] Univ Chicago, Origins Lab, Dept Geophys Sci, Chicago, IL 60637 USA

[7] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[8] Univ Wurzburg, D-97074 Wurzburg, Germany

[9] Max Planck Inst Astrophys, D-85748 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 795卷 / 02期

基金：

欧洲研究理事会;

关键词：

atomic processes; Galaxy: abundances; meteorites; meteors; meteoroids; nuclear reactions; nucleosynthesis; abundances; supernovae: general; ASTROPHYSICAL REACTION-RATES; GIANT BRANCH STARS; EARLY SOLAR-SYSTEM; SM-146; PRODUCTION; NEUTRON-CAPTURE; CROSS-SECTIONS; HALF-LIFE; S-PROCESS; NUCLEOSYNTHESIS; MODELS;

D O I：

10.1088/0004-637X/795/2/141

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae (SNe Ia) with different metallicities. The predicted abundances of the short-lived radioactive isotopes Nb-92, Tc-97,Tc-98, and Sm-146 are given in this framework. The abundance seeds are obtained by calculating s-process nucleosynthesis in the material accreted onto a carbon-oxygen white dwarf from a binary companion. A fine grid of s-seeds at different metallicities and C-13-pocket efficiencies is considered. A galactic chemical evolution model is used to predict the contribution of SN Ia to the solar system p-nuclei composition measured in meteorites. Nuclear physics uncertainties are critical to determine the role of SNe Ia in the production of Nb-92 and Sm-146. We find that, if standard Chandrasekhar-mass SNe Ia are at least 50% of all SN Ia, they are strong candidates for reproducing the radiogenic p-process signature observed in meteorites.

引用

页数：8

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