Early Solar System r -process Abundances Limit Collapsar Origin

Bartos, I. and Márka, S. (2019) Early Solar System r -process Abundances Limit Collapsar Origin. The Astrophysical Journal, 881 (1). L4. ISSN 2041-8213

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Heavy elements produced exclusively through rapid neutron capture (the "r-process") originate from violent cosmic explosions. While neutron star mergers are the primary candidates, another plausible production site are "collapsars"—collapsing massive stars that form a black hole with an accretion disk. Here we show that collapsars are too rare to be the prime origin of r-process elements in the solar system. By comparing numerical simulations with the early solar system abundances of actinides produced exclusively through the r-process, we exclude higher than 20% contribution from collapsars with 90% confidence. We additionally limit r-process ejecta masses from collapsars to less than 10% of the ejecta mass from neutron star mergers, about 10−2 M⊙.

Item Type: Article
Subjects: Eprints STM archive > Physics and Astronomy
Depositing User: Unnamed user with email admin@eprints.stmarchive
Date Deposited: 31 May 2023 07:41
Last Modified: 27 Dec 2023 07:07
URI: http://public.paper4promo.com/id/eprint/532

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