Supernova Neutrino Process of Li and B Revisited

Motohiko Kusakabe, Myung Ki Cheoun, K. S. Kim, Masa Aki Hashimoto, Masaomi Ono, Ken'Ichi Nomoto, Toshio Suzuki, Toshitaka Kajino, Grant J. Mathews

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Abstract

We reinvestigate effects of neutrino oscillations on the production of 7 Li and 11 B in core-collapse supernovae (SNe). During the propagation of neutrinos from the proto-neutron star, their flavors change, and the neutrino reaction rates for spallation of 12 C and 4 He are affected. In this work, corrected neutrino spallation cross sections for 4 He and 12 C are adopted. Initial abundances involving heavy s-nuclei and other physical conditions are derived in a new calculation of the SN 1987A progenitor in which the effects of the progenitor metallicity are included. A dependence of the SN nucleosynthesis and final yields of 7 Li and 11 B on the neutrino mass hierarchy are shown in several stellar locations. In the normal hierarchy case, the charged-current (CC) reaction rates of are enhanced, and yields of proton-rich nuclei, along with 7 Be and 11 C, are increased. In the inverted hierarchy case, the CC reaction rates of are enhanced, and yields of neutron-rich nuclei, along with 7 Li and 11 B, are increased. We find that variation of the metallicity modifies the yields of 7 Li, 7 Be, 11 B, and 11 C. This effect is caused by changes in the neutron abundance during SN nucleosynthesis. Therefore, accurate calculations of Li and B production in SNe should take into account the metallicity of progenitor stars.

Original languageEnglish
Article number164
JournalAstrophysical Journal
Volume872
Issue number2
DOIs
Publication statusPublished - Jan 1 2019

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Kusakabe, M., Cheoun, M. K., Kim, K. S., Hashimoto, M. A., Ono, M., Nomoto, KI., ... Mathews, G. J. (2019). Supernova Neutrino Process of Li and B Revisited. Astrophysical Journal, 872(2), [164]. https://doi.org/10.3847/1538-4357/aafc35