Postbounce evolution of core-collapse supernovae: Long-term effects of the equation of state

K. Sumiyoshi, Shoichi Yamada, H. Suzuki, H. Shen, S. Chiba, H. Toki

    Research output: Contribution to journalArticle

    191 Citations (Scopus)

    Abstract

    We study the evolution of a supernova core from the beginning of the gravitational collapse of a 15 M⊙ star up to 1s after core bounce. We present results of spherically symmetric simulations of core-collapse supernovae by solving general relativistic ν-radiation hydrodynamics in the implicit time differencing. We aim to explore the evolution of shock waves in the long term and investigate the formation of proto-neutron stars together with supernova neutrino signatures. These studies are done to examine the influence of the equation of state (EOS) on the postbounce evolution of shock waves in the late phase and the resulting thermal evolution of proto-neutron stars. We compare two sets of EOSs, namely, those by Lattimer and Swesty (LS-EOS) and by Shen et al. (SH-EOS). We found that, for both EOSs, the core does not explode and the shock wave stalls similarly in the first 100 ms after bounce. A revival of the shock wave does not occur even after a long period in either case. However, the recession of the shock wave appears different beyond 200 ms after bounce, having different thermal evolution of the central core. A more compact proto-neutron star is found for LS-EOS than SH-EOS with a difference in the central density by a factor of ∼2 and a difference of ∼10 MeV in the peak temperature. The resulting spectra of supernova neutrinos are different to an extent that may be detectable by terrestrial neutrino detectors.

    Original languageEnglish
    Pages (from-to)922-932
    Number of pages11
    JournalAstrophysical Journal
    Volume629
    Issue number2 I
    DOIs
    Publication statusPublished - 2005 Aug 20

    Fingerprint

    long term effects
    shock wave
    equation of state
    supernovae
    shock waves
    equations of state
    neutron stars
    neutrinos
    thermal evolution
    EOS
    recession
    M stars
    gravitational collapse
    hydrodynamics
    signatures
    long-term effect
    detectors
    radiation
    simulation
    temperature

    Keywords

    • Equation of state
    • Hydrodynamics
    • Neutrinos
    • Stars: neutron
    • Supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Postbounce evolution of core-collapse supernovae : Long-term effects of the equation of state. / Sumiyoshi, K.; Yamada, Shoichi; Suzuki, H.; Shen, H.; Chiba, S.; Toki, H.

    In: Astrophysical Journal, Vol. 629, No. 2 I, 20.08.2005, p. 922-932.

    Research output: Contribution to journalArticle

    Sumiyoshi, K. ; Yamada, Shoichi ; Suzuki, H. ; Shen, H. ; Chiba, S. ; Toki, H. / Postbounce evolution of core-collapse supernovae : Long-term effects of the equation of state. In: Astrophysical Journal. 2005 ; Vol. 629, No. 2 I. pp. 922-932.
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