Radiogenic p-isotopes from SNIa, nuclear physics uncertainties and Galactic chemical evolution compared with values in primitive meteorites
| Autor: | Travaglio, C., Gallino, R., Rauscher, T., Dauphas, N., Roepke, F. K. R., Hillebrandt, W. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Ap. J. 795 (2014) 141 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0004-637X/795/2/141 |
| Popis: | The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae with different metallicities. The predicted abundances of the short-lived radioactive isotopes 92Nb, 97Tc, 98Tc and 146Sm 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 13C-pocket efficiencies is considered. A galactic chemical evolution model is used to predict the contribution of SNIa to the solar system p-nuclei composition measured in meteorites. Nuclear physics uncertainties are critical to determine the role of SNeIa in the production of 92Nb and 146Sm. We find that, if standard Chandrasekhar-mass SNeIa are at least 50% of all SNIa, they are strong candidates for reproducing the radiogenic p-process signature observed in meteorites. Comment: Astrophysical Journal, in press |
| Databáze: | arXiv |
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