The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae

Details The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae

1997-09-18

arxiv.org/abs/astro-ph/9709184v1

Astronomy and Astrophysics

Astrophysics

61 pages, 31 figures; accepted for publication in The Astrophysical Journal

Scientific paper

10.1086/305164

We couple two-dimensional hydrodynamics to realistic one-dimensional multigroup flux-limited diffusion neutrino transport to investigate protoneutron star convection in core collapse supernovae, and more specifically, the interplay between its development and neutrino transport, for both 15 and 25 solar mass models. In the presence of neutrino transport, protoneutron star convection velocities are too small relative to bulk inflow velocities to result in any significant convective transport of entropy and leptons. A simple analytical model supports our numerical results, indicating that the inclusion of neutrino transport reduces the entropy-driven (lepton-driven) convection growth rates and asymptotic velocities by a factor of 3 (50) at the neutrinosphere and a factor 250 (1000) at a density of 10^{12} g/cm^{3}, for both our 15 and 25 solar mass models. Moreover, when transport is included, the initial postbounce entropy gradient is smoothed out by neutrino diffusion, whereas the initial lepton gradient is maintained by electron capture and neutrino escape near the neutrinosphere. Despite the maintenance of the lepton gradient, protoneutron star convection does not develop over the 100 ms duration typical of all our simulations, except in the instance where ``low-test'' initial conditions are used, which are generated by core collapse and bounce simulations that neglect neutrino-electron scattering and ion-ion screening corrections to neutrino- nucleus elastic scattering.

Affiliated with

Also associated with

No associations

Rating

The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Interplay Between Protoneutron Star Convection and Neutrino Transport in Core Collapse Supernovae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-691696