Possibility to Identify the Contributions from Collapsars, Supernovae, and Neutron Star Mergers from the Evolution of the r-process Mass Abundance Distribution

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, and collapsars under a range of astrophysical conditions and nuclear input data. Here we show that, although the...

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Bibliographic Details
Published in:The Astrophysical journal 2022-07, Vol.933 (1), p.112
Main Authors: Yamazaki, Yuta, He, Zhenyu, Kajino, Toshitaka, Mathews, Grant J., Famiano, Michael A., Tang, Xiaodong, Shi, Jianrong
Format: Article
Language:English
Subjects:
Abundance
ASTRONOMY AND ASTROPHYSICS
Astrophysics
Collapsars
Evolution
Explosive nucleosynthesis
Galaxies
Galaxy chemical evolution
Isotopes
Neutron stars
Nuclear capture
Nuclear fusion
Observatories
R-process
Star mergers
Stars & galaxies
Supernovae
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Summary: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, and collapsars under a range of astrophysical conditions and nuclear input data. Here we show that, although the r-process in each of these sites can lead to a similar (universal) elemental distribution, the detailed isotopic abundances can differ from one site to another. These differences may allow for the identification of which sources contributed to the early evolution of r-process material in the galaxy. Our simulations suggest that the early evolution was dominated by CCSNe and collapsar r-process nucleosynthesis. This conclusion may be testable if the next generation of observatories can deduce isotopic r-process abundances.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac721c