Multidimensional Radiation/Hydrodynamic Simulations of Proto–Neutron Star Convection
نویسندگان
چکیده
منابع مشابه
Multi-dimensional Radiation/hydrodynamic Simulations of Protoneutron Star Convection
Based on multi-dimensional multi-group radiation hydrodynamic simulations of core-collapse supernovae with the VULCAN/2D code, we study the physical conditions within and in the vicinity of the nascent protoneutron star (PNS). Conclusions of this work are threefold: First, as before, we do not see any large-scale overturn of the inner PNS material. Second, we see no evidence of doubly-diffusive...
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Neutrino-driven winds are thought to accompany the Kelvin-Helmholtz cooling phase of nascent protoneutron stars in the first seconds after a core-collapse supernova. These outflows are a likely candidate as the astrophysical site for rapid neutron-capture nucleosynthesis (the rprocess). In this chapter we review the physics of protoneutron star winds and assess their potential as a site for the...
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Two-dimensional (2D) hydrodynamical simulations of the deleptonization of a newly formed neutron star (NS) were performed. Driven by negative lepton fraction and entropy gradients, convection starts near the neutrinosphere about 20– 30 ms after core bounce, but moves deeper into the protoneutron star (PNS), and after about one second the whole PNS is convective. The deleptonization of the star ...
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Because of their neutron-richness and association with supernovae, postexplosion protoneutron star winds are thought to be a likely astrophysical site for rapid neutron capture nucleosynthesis (the r-process). However, the most recent models of spherical neutrino-driven protoneutron star winds do not produce robust r-process nucleosynthesis for ‘canonical’ neutron stars with a gravitational mas...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/504068