Nuclear liquid-gas phase transition and supernovae evolution

Details Nuclear liquid-gas phase transition and supernovae evolution Nuclear liquid-gas phase transition and supernovae evolution

2004-01-26

arxiv.org/abs/astro-ph/0401545v2

Phys.Rev. C70 (2004) 028801

Astronomy and Astrophysics

Astrophysics

version2 - precise that nuclear liquid-gas phase transition is 1st order and the unique instable mode is isoscalar

Scientific paper

10.1103/PhysRevC.70.028801

It is shown that the large density fluctuations appearing at the onset of the first order nuclear liquid-gas phase transition can play an important role in the supernovae evolution. Due to these fluctuations, the neutrino gas may be trapped inside a thin layer of matter near the proto-neutron star surface. The resulting increase of pressure may induce strong particle ejection a few hundred milliseconds after the bounce of the collapse, contributing to the revival of the shock wave. The Hartree-Fock+RPA scheme, with a finite-range nucleon-nucleon effective interaction, is employed to estimate the effects of the neutrino trapping due to the strong density fluctuations, and to discuss qualitatively the consequences of the suggested new scenario.

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