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.
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页数：8
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