Stability of the accretion flows with stalled shocks in core-collapse supernovae

T. Yamasaki, Shoichi Yamada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    With an eye toward application to the theory of core-collapse supernovae, we performed a global linear analysis on the stability of spherically symmetric accretion flows through a standing shock wave onto a proto neutron star. We solved the equations for linear perturbations numerically, and obtained the eigen frequencies and eigen functions. The results show that the non-radial instabilities are induced, probably via the advection-acoustic cycles, for relatively low neutrino luminosities, e.g. ∼2-7×1052ergs/s for M=1.0M/s. For still larger luminosities, more than about 7×1052ergs/s for the same accretion rate, non-oscillatory modes become unstable. These non-radial modes were identified as convection.

    Original languageEnglish
    Title of host publicationAIP Conference Proceedings
    Pages344-348
    Number of pages5
    Volume937
    DOIs
    Publication statusPublished - 2007
    EventSUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters - Aspen, CO
    Duration: 2007 Feb 192007 Feb 23

    Other

    OtherSUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters
    CityAspen, CO
    Period07/2/1907/2/23

    Fingerprint

    supernovae
    shock
    luminosity
    advection
    neutron stars
    shock waves
    convection
    neutrinos
    perturbation
    cycles
    acoustics

    Keywords

    • Hydrodynamics
    • Instabilities
    • Shock waves
    • Supernovae

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Stability of the accretion flows with stalled shocks in core-collapse supernovae. / Yamasaki, T.; Yamada, Shoichi.

    AIP Conference Proceedings. Vol. 937 2007. p. 344-348.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Yamasaki, T & Yamada, S 2007, Stability of the accretion flows with stalled shocks in core-collapse supernovae. in AIP Conference Proceedings. vol. 937, pp. 344-348, SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters, Aspen, CO, 07/2/19. https://doi.org/10.1063/1.2803589
    Yamasaki, T. ; Yamada, Shoichi. / Stability of the accretion flows with stalled shocks in core-collapse supernovae. AIP Conference Proceedings. Vol. 937 2007. pp. 344-348
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