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        Radiogenic p-isotopes from type Ia supernova, nuclear physics uncertainties, and galactic chemical evolution compared with values in primitive meteorites

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        1408.6643v1.pdf (PDF, 999Kb)
        Author
        Travaglio, C.
        Gallino, R.
        Rauscher, T.
        Dauphas, N.
        Röpke, F. K.
        Hillebrandt, W.
        Attention
        2299/14770
        Abstract
        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 92Nb, 97, 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 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 92Nb and 146Sm. 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.
        Publication date
        2014-11-10
        Published in
        The Astrophysical Journal
        Published version
        https://doi.org/10.1088/0004-637X/795/2/141
        Other links
        http://hdl.handle.net/2299/14770
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