Prompt convection in core collapse supernovae

Details Prompt convection in core collapse supernovae Prompt convection in core collapse supernovae

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...433l..45b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 433, no. 1, p. L45-L48

Physics

32

Equations Of State, Gravitational Collapse, Neutron Stars, Shock Wave Interaction, Stellar Convection, Stellar Cores, Stellar Evolution, Stellar Gravitation, Stellar Models, Supernovae, Computerized Simulation, Hydrodynamics, Mathematical Models, Neutrinos, Shock Waves

Scientific paper

We investigate prompt convection in core collapse supernovae and its consequences for the late-time shock evolution and supernova outcome. We examine the evolution of the core prior to the onset of convection and find that the negative entropy gradients imprinted on the outer core by the weakening shock, which, along with the negative lepton gradient, drive the convection, are very sensitive to (1) the neutrino transport and microphysics included in the core collapse simulation and (2) the nuclear equation of state. We perform a number of detailed one-dimensional spherically symmetric of prompt convection using a mixing-length algorithm in a code coupling the core hydrodynamics with multigroup flux-limited diffusion of neutrinos of all types. We find that prompt convection does not have a significant effect on the neutrino luminosities or spectra in the postshock region and, consequently, on the late-time postshock neutrino heating and shock evolution. Consequently, we do not find that prompt convection is important for the supernova explosion mechanism.

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