Impact of Hypernova νp-process Nucleosynthesis on the Galactic Chemical Evolution of Mo and Ru

Sasaki, Hirokazu; Yamazaki, Yuta; Kajino, Toshitaka; Kusakabe, Motohiko; Hayakawa, Takehito; Cheoun, Myung-Ki; Ko, Heamin; Mathews, Grant J.

doi:10.3847/1538-4357/ac34f8

Title: Impact of Hypernova νp-process Nucleosynthesis on the Galactic Chemical Evolution of Mo and Ru

Journal Article · 10 January 2022 · The Astrophysical Journal

DOI: https://doi.org/10.3847/1538-4357/ac34f8 · OSTI ID:1981240

^[1]; Yamazaki, Yuta ^[2];

^[3];

^[4]; Hayakawa, Takehito ^[5];

^[6]; Ko, Heamin ^[6];

^[7]

National Astronomical Observatory of Japan, Tokyo (Japan); Univ. of Notre Dame, IN (United States)
National Astronomical Observatory of Japan, Tokyo (Japan); Univ. of Tokyo (Japan)
National Astronomical Observatory of Japan, Tokyo (Japan); Univ. of Tokyo (Japan); Beihang University, Beijing (China)
Beihang University, Beijing (China)
National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki (Japan); Osaka Univ. (Japan)
Soongsil University, Seoul (Korea, Republic of)
University of Notre Dame, IN (United States)

We calculate the Galactic Chemical Evolution of Mo and Ru by taking into account the contribution from νp-process nucleosynthesis. We estimate yields of p-nuclei such as ^92,94Mo and ^96,98Ru through the νp-process in various supernova progenitors based upon recent models. In particular, the νp-process in energetic hypernovae produces a large amount of p-nuclei compared to the yield in ordinary core-collapse SNe. Because of this, the abundances of ^92,94Mo and ^96,98Ru in the Galaxy are significantly enhanced at [Fe/H] = 0 by the νp-process. We find that the νp-process in hypernovae is the main contributor to the elemental abundance of ⁹²Mo at low metallicity [Fe/H] < −2. Our theoretical prediction of the elemental abundances in metal-poor stars becomes more consistent with observational data when the νp-process in hypernovae is taken into account.

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Research Organization:: University of Notre Dame, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-95ER40934

OSTI ID:: 1981240

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 924; ISSN 0004-637X

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
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Title: Impact of Hypernova νp-process Nucleosynthesis on the Galactic Chemical Evolution of Mo and Ru

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