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

T. Yamasaki, S. 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 publicationSUPERNOVA 1987A
Subtitle of host publication20 YEARS AFTER: Supernovae and Gamma-Ray Bursters
Pages344-348
Number of pages5
DOIs
Publication statusPublished - 2007 Dec 14
EventSUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters - Aspen, CO, United States
Duration: 2007 Feb 192007 Feb 23

Publication series

NameAIP Conference Proceedings
Volume937
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

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

Keywords

  • Hydrodynamics
  • Instabilities
  • Shock waves
  • Supernovae

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

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