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Contribution of collapsars, supernovae, and neutron star mergers to the evolution of r-process elements in the Galaxy

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arxiv 2102.05891 v1 pith:7PXWCL53 submitted 2021-02-11 astro-ph.GA

Contribution of collapsars, supernovae, and neutron star mergers to the evolution of r-process elements in the Galaxy

classification astro-ph.GA
keywords r-processcontributiongalaxyccsnecollapsarsevolutionmergersneutron
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the evolution of rapid neutron-capture process (r-process) isotopes in the Galaxy. We analyze relative contributions from core collapse supernovae (CCSNe), neutron star mergers (NSMs) and collapsars under a range of astrophysical conditions and nuclear input data. Although the r-process in each of these sites can lead to similar (or differing) isotopic abundances, our simulations reveal that the early contribution of r-process material to the Galaxy was dominated by CCSNe and collapsar r-process nucleosynthesis, while the NSM contribution is unavoidably delayed even under the assumption of the shortest possible minimum merger time.

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