Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae

H. Togashi, Masatoshi Takano, K. Sumiyoshi, K. Nakazato

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    The equation of state (EOS) for hot asymmetric nuclear matter that is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied to spherically symmetric core-collapse supernovae (SNe). We first investigate the EOS of isentropic ß-stable SN matter, and find that matter with the variational EOS is more neutron-rich than that with the Shen EOS. Using the variational EOS for uniform matter supplemented by the Shen EOS for non-uniform matter at low densities, we perform general-relativistic spherically symmetric simulations of core-collapse SNe with and without neutrino transfer, starting from a presupernova model of 15 M⊙. In the adiabatic simulation without neutrino transfer, the explosion is successful, and the explosion energy with the variational EOS is larger than that with the Shen EOS. In the case of the simulation with neutrino transfer, the shock wave stalls and then the explosion fails, as in other spherically symmetric simulations. The inner core with the variational EOS is more compact than that with the Shen EOS, due to the relative softness of the variational EOS. This implies that the variational EOS is more advantageous for SN explosions than the Shen EOS.

    Original languageEnglish
    Article number023D05
    JournalProgress of Theoretical and Experimental Physics
    Volume2014
    Issue number2
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    supernovae
    equations of state
    explosions
    neutrinos
    simulation
    softness
    shock waves
    neutrons

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae. / Togashi, H.; Takano, Masatoshi; Sumiyoshi, K.; Nakazato, K.

    In: Progress of Theoretical and Experimental Physics, Vol. 2014, No. 2, 023D05, 2014.

    Research output: Contribution to journalArticle

    @article{d2dab80504214770952af8732f5c61be,
    title = "Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae",
    abstract = "The equation of state (EOS) for hot asymmetric nuclear matter that is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied to spherically symmetric core-collapse supernovae (SNe). We first investigate the EOS of isentropic {\ss}-stable SN matter, and find that matter with the variational EOS is more neutron-rich than that with the Shen EOS. Using the variational EOS for uniform matter supplemented by the Shen EOS for non-uniform matter at low densities, we perform general-relativistic spherically symmetric simulations of core-collapse SNe with and without neutrino transfer, starting from a presupernova model of 15 M⊙. In the adiabatic simulation without neutrino transfer, the explosion is successful, and the explosion energy with the variational EOS is larger than that with the Shen EOS. In the case of the simulation with neutrino transfer, the shock wave stalls and then the explosion fails, as in other spherically symmetric simulations. The inner core with the variational EOS is more compact than that with the Shen EOS, due to the relative softness of the variational EOS. This implies that the variational EOS is more advantageous for SN explosions than the Shen EOS.",
    author = "H. Togashi and Masatoshi Takano and K. Sumiyoshi and K. Nakazato",
    year = "2014",
    doi = "10.1093/ptep/ptu020",
    language = "English",
    volume = "2014",
    journal = "Progress of Theoretical and Experimental Physics",
    issn = "2050-3911",
    publisher = "Oxford University Press",
    number = "2",

    }

    TY - JOUR

    T1 - Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae

    AU - Togashi, H.

    AU - Takano, Masatoshi

    AU - Sumiyoshi, K.

    AU - Nakazato, K.

    PY - 2014

    Y1 - 2014

    N2 - The equation of state (EOS) for hot asymmetric nuclear matter that is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied to spherically symmetric core-collapse supernovae (SNe). We first investigate the EOS of isentropic ß-stable SN matter, and find that matter with the variational EOS is more neutron-rich than that with the Shen EOS. Using the variational EOS for uniform matter supplemented by the Shen EOS for non-uniform matter at low densities, we perform general-relativistic spherically symmetric simulations of core-collapse SNe with and without neutrino transfer, starting from a presupernova model of 15 M⊙. In the adiabatic simulation without neutrino transfer, the explosion is successful, and the explosion energy with the variational EOS is larger than that with the Shen EOS. In the case of the simulation with neutrino transfer, the shock wave stalls and then the explosion fails, as in other spherically symmetric simulations. The inner core with the variational EOS is more compact than that with the Shen EOS, due to the relative softness of the variational EOS. This implies that the variational EOS is more advantageous for SN explosions than the Shen EOS.

    AB - The equation of state (EOS) for hot asymmetric nuclear matter that is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied to spherically symmetric core-collapse supernovae (SNe). We first investigate the EOS of isentropic ß-stable SN matter, and find that matter with the variational EOS is more neutron-rich than that with the Shen EOS. Using the variational EOS for uniform matter supplemented by the Shen EOS for non-uniform matter at low densities, we perform general-relativistic spherically symmetric simulations of core-collapse SNe with and without neutrino transfer, starting from a presupernova model of 15 M⊙. In the adiabatic simulation without neutrino transfer, the explosion is successful, and the explosion energy with the variational EOS is larger than that with the Shen EOS. In the case of the simulation with neutrino transfer, the shock wave stalls and then the explosion fails, as in other spherically symmetric simulations. The inner core with the variational EOS is more compact than that with the Shen EOS, due to the relative softness of the variational EOS. This implies that the variational EOS is more advantageous for SN explosions than the Shen EOS.

    UR - http://www.scopus.com/inward/record.url?scp=84898410029&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84898410029&partnerID=8YFLogxK

    U2 - 10.1093/ptep/ptu020

    DO - 10.1093/ptep/ptu020

    M3 - Article

    VL - 2014

    JO - Progress of Theoretical and Experimental Physics

    JF - Progress of Theoretical and Experimental Physics

    SN - 2050-3911

    IS - 2

    M1 - 023D05

    ER -