Neutrino transport in type-II supernovae and protoneutron stars by Monte Carlo methods.

Details Neutrino transport in type-II supernovae and protoneutron stars by Monte Carlo methods. Neutrino transport in type-II supernovae and protoneutron stars by Monte Carlo methods.

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ntts.book.....j&link_type=abstract

Neutrino transport in type-II supernovae and protoneutron stars by Monte Carlo methods., by Janka, H.-T.. Max-Planck-Institut f

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1

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This thesis is divided into the following parts: Chapter 2 describes the construction of the Monte Carlo algorithm. Chapter 3 turns to the application of these techniques to the problem of neutrino transport in different situations, which were taylored by using data from hydrodynamical core collapse simulations. The author investigates models for stages several milliseconds and several hundred milliseconds after core bounce as well as for different moments during the first ten seconds of the cooling of the newly born neutron star. A comparison between results obtained by flux-limited diffusion schemes and those found in the Monte Carlo computations are made. Influences of the various neutrino reactions on the spectral shape are discussed. Implications for the interpretation of neutrino detections are addressed. Detailed information about the radiation flow pattern is employed to gain insight into the efficiency of energy deposition by neutriono fluxes below a standing accretion shock. This leads over to Chapter 4, where the author critisizes currently used transport approximations on grounds of these results. In Chapter 5 the new aspects of the presented work are summarized and final conclusions are drawn.

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