Type II supernovae: stellar core collapse and Boltzmann neutrino transport
نویسنده
چکیده
In this paper we present results from the gravitational collapse of a 1:17 M iron core extracted from a 13 M star obtained from Nomoto and Hashimoto (Nomoto and Hashimoto 1988). The collapse was carried out using the Baron-Cooperstein equation of state (Cooperstein 1985; Baron, Cooperstein, and Kahana 1985). The results were obtained with two radiation hydrodynamics codes. One code uses the exact electron neutrino Boltzmann equation for the neutrino transport (Mezzacappa and Bruenn 1992a-d), and the other uses a multigroup ux-limited diiusion approximation (Bruenn 1985). The results from both codes are presented, and a comparison between the two is made. We discuss the implications of our results for the late-time neutrino-heating shock-ejection mechanism and for the late-time supernova evolution.
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