Electron capture rates for core collapse supernovae
نویسندگان
چکیده
منابع مشابه
Neutrino signal of electron-capture supernovae from core collapse to cooling.
An 8.8M{⊙} electron-capture supernova was simulated in spherical symmetry consistently from collapse through explosion to essentially complete deleptonization of the forming neutron star. The evolution time (∼9 s) is short because high-density effects suppress our neutrino opacities. After a short phase of accretion-enhanced luminosities (∼200 ms), luminosity equipartition among all species b...
متن کاملUnderstanding Core-Collapse Supernovae
At the University of Arizona, we have a major effort to study core-collapse supernovae, neutrino opacities and transfer, multi-dimensional radiation hydrodynamics, pulsar kicks, and gravitational radiation from supernovae. We have developed a precision 1D (spherical) multigroup implicit Boltzmann solver, SESAME 1 [1, 2], using the Feautrier technique, with the tangent-ray method to achieve exce...
متن کاملThe effective electron mass in core-collapse supernovae
Finite temperature field theory is used to calculate the correction to the mass of the electron in plasma with finite temperature and arbitrary chemical potential, and the results are applied to the core regions of type II supernovae (SNe). It is shown that the effective electron mass varies between 1 MeV at the edge of the SN core up to 11 MeV near the center. This changed electron mass affect...
متن کاملElectron capture rates on nuclei and implications for stellar core collapse.
Supernova simulations to date have assumed that during core collapse electron captures occur dominantly on free protons, while captures on heavy nuclei are Pauli blocked and are ignored. We have calculated rates for electron capture on nuclei with mass numbers A=65-112 for the temperatures and densities appropriate for core collapse. We find that these rates are large enough so that, in contras...
متن کاملNon - spherical core collapse supernovae
Two-dimensional simulations of strongly anisotropic supernova explosions of a nonrotating 15 M ⊙ blue supergiant progenitor are presented, which follow the hydrodynamic evolution from times shortly after shock formation until hours later. It is shown that explosions which around the time of shock revival are dominated by low-order unstable modes (i.e. by a superposition of the l = 2 and l = 1 m...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2003
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(03)00832-7