Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae

Hiroki Nagakura, Shun Furusawa, Hajime Togashi, Sherwood Richers, Kohsuke Sumiyoshi, Shoichi Yamada

    研究成果: Article

    抄録

    We perform an extensive study of the influence of nuclear weak interactions on core-collapse supernovae, paying particular attention to consistency between nuclear abundances in the equation of state (EOS) and nuclear weak interactions. We compute properties of uniform matter based on the variational method. For inhomogeneous nuclear matter, we take a full ensemble of nuclei into account with various finite-density and thermal effects and directly use the nuclear abundances to compute nuclear weak interaction rates. To quantify the impact of a consistent treatment of nuclear abundances on CCSN dynamics, we carry out spherically symmetric CCSN simulations with full Boltzmann neutrino transport, systematically changing the treatment of weak interactions, EOSs, and progenitor models. We find that the inconsistent treatment of nuclear abundances between the EOS and weak interaction rates weakens the EOS dependence of both the dynamics and neutrino signals. We also test the validity of two artificial prescriptions for weak interactions of light nuclei and find that both prescriptions affect the dynamics. Furthermore, there are differences in neutrino luminosities by ∼10% and in average neutrino energies by 0.25-1 MeV from those of the fiducial model. We also find that the neutronization burst neutrino signal depends on the progenitor more strongly than on the EOS, preventing a detection of this signal from constraining the EOS.

    元の言語English
    記事番号38
    ジャーナルAstrophysical Journal, Supplement Series
    240
    発行部数2
    DOI
    出版物ステータスPublished - 2019 2 1

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    equation of state
    supernovae
    equations of state
    neutrinos
    nuclei
    simulation
    EOS
    temperature effect
    temperature effects
    bursts
    luminosity
    energy
    rate
    prescription

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    これを引用

    Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae. / Nagakura, Hiroki; Furusawa, Shun; Togashi, Hajime; Richers, Sherwood; Sumiyoshi, Kohsuke; Yamada, Shoichi.

    :: Astrophysical Journal, Supplement Series, 巻 240, 番号 2, 38, 01.02.2019.

    研究成果: Article

    Nagakura, Hiroki ; Furusawa, Shun ; Togashi, Hajime ; Richers, Sherwood ; Sumiyoshi, Kohsuke ; Yamada, Shoichi. / Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae. :: Astrophysical Journal, Supplement Series. 2019 ; 巻 240, 番号 2.
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