Hyperon matter and black hole formation in failed supernovae

Ken'Ichiro Nakazato, Shun Furusawa, Kohsuke Sumiyoshi, Akira Ohnishi, Shoichi Yamada, Hideyuki Suzuki

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    We investigate the emergence of hyperons in black-hole-forming failed supernovae, which are caused by the dynamical collapse of nonrotating massive stars. We perform neutrino-radiation hydrodynamical simulations in general relativity, adopting realistic hyperonic equation of state. Attractive and repulsive cases are examined for the potential of Σ hyperons. Since hyperons soften the EOS, they shorten the time interval from bounce to black hole formation, which corresponds to the duration of neutrino emission. This effect is more pronounced in the attractive case than in the repulsive case because Σ hyperons appear more easily. In addition, we investigate the impacts of pions to find that they also promote recollapse toward black hole formation.

    Original languageEnglish
    Article number197
    JournalAstrophysical Journal
    Volume745
    Issue number2
    DOIs
    Publication statusPublished - 2012 Feb 1

    Fingerprint

    hyperons
    EOS
    equation of state
    supernovae
    simulation
    neutrinos
    massive stars
    relativity
    pions
    equations of state
    intervals
    radiation
    effect

    Keywords

    • black hole physics
    • dense matter
    • equation of state
    • hydrodynamics
    • methods: numerical
    • neutrinos

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Nakazato, KI., Furusawa, S., Sumiyoshi, K., Ohnishi, A., Yamada, S., & Suzuki, H. (2012). Hyperon matter and black hole formation in failed supernovae. Astrophysical Journal, 745(2), [197]. https://doi.org/10.1088/0004-637X/745/2/197

    Hyperon matter and black hole formation in failed supernovae. / Nakazato, Ken'Ichiro; Furusawa, Shun; Sumiyoshi, Kohsuke; Ohnishi, Akira; Yamada, Shoichi; Suzuki, Hideyuki.

    In: Astrophysical Journal, Vol. 745, No. 2, 197, 01.02.2012.

    Research output: Contribution to journalArticle

    Nakazato, KI, Furusawa, S, Sumiyoshi, K, Ohnishi, A, Yamada, S & Suzuki, H 2012, 'Hyperon matter and black hole formation in failed supernovae', Astrophysical Journal, vol. 745, no. 2, 197. https://doi.org/10.1088/0004-637X/745/2/197
    Nakazato, Ken'Ichiro ; Furusawa, Shun ; Sumiyoshi, Kohsuke ; Ohnishi, Akira ; Yamada, Shoichi ; Suzuki, Hideyuki. / Hyperon matter and black hole formation in failed supernovae. In: Astrophysical Journal. 2012 ; Vol. 745, No. 2.
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