Impact of quarks and pions on dynamics and neutrino signal of black hole formation in non-rotating stellar core collapse

Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Shoichi Yamada

    Research output: Contribution to journalArticle

    32 Citations (Scopus)

    Abstract

    In the formation process of black holes, the density and temperature of matter become sufficiently high for quarks and pions to appear. In this study, we numerically investigate stellar core collapse and black hole formation taking into account the equations of state involving quarks and/or pions. In our simulations, we utilize a code that solves the general relativistic hydrodynamics and neutrino transfer equations simultaneously, treating neutrino reactions in detail under spherical symmetry. Initial models with three different masses, namely, 40, 100, and 375M, are adopted. Our results show that quarks and pions shorten the duration of neutrino emission if the collapse bounces before black hole formation. In addition, pions increase the luminosity and average energy of neutrinos before black hole formation. We also find that the hadron-quark phase transition leads to an interesting evolution of temperature. Moreover, the neutrino event number is evaluated for the currently operating neutrino detector, SuperKamiokande, to confirm that it is not only detectable but also affected by the emergence of quarks and pions for Galactic events. While there are some issues, such as hyperons, beyond the scope of this study, this is the first serious attempt to assess the impact of quarks and pions in dynamical simulations of black hole formation and will serve as an important foundation for future studies.

    Original languageEnglish
    Pages (from-to)1284-1294
    Number of pages11
    JournalAstrophysical Journal
    Volume721
    Issue number2
    DOIs
    Publication statusPublished - 2010 Oct 1

    Fingerprint

    stellar cores
    pions
    neutrinos
    quarks
    phase transition
    equation of state
    simulation
    symmetry
    temperature
    hydrodynamics
    energy
    hyperons
    equations of state
    luminosity
    detectors
    detector
    code

    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

    Impact of quarks and pions on dynamics and neutrino signal of black hole formation in non-rotating stellar core collapse. / Nakazato, Ken'ichiro; Sumiyoshi, Kohsuke; Yamada, Shoichi.

    In: Astrophysical Journal, Vol. 721, No. 2, 01.10.2010, p. 1284-1294.

    Research output: Contribution to journalArticle

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