Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mmsai..49..399c&link_type=abstract
(Societ1/4a Astronomica Italiana and Consiglio Nazionale delle Ricerche, Workshop on Supernovae and Supernova Remnants, 1st, Eri
Astronomy and Astrophysics
Astrophysics
4
Magnetohydrodynamics, Neutrinos, Stellar Mass Ejection, Supernovae, Astrophysics, Neutron Stars, Taylor Instability
Scientific paper
The dilemma of neutrino trapping in a stellar collapse that leads to the formation of a neutron star and a supernova (SN) is reviewed and confirmed. It is argued that core bounce alone is too subtle and marginal to explain satisfactorily SN mass ejection and that the hypothesis of convective instability of a partially neutronized core is critically important with respect to mass ejection. It is suggested that convective instability of a partially neutronized core allows Taylor-unstable exponential growth of initial asymmetries or perturbations during several bounces, resulting in a rapid overturn of the neutrino-trapped core. This process is shown to have two possible beneficial consequences: (1) the augmented released neutrino flux can significantly increase the bounce-initiated first- and second-bounce mass ejection, and (2) the convective neutrino release allows the earlier formation of a cold neutron star, so that a subsequent accretion shock forms with sufficient neutrino luminosity to cause mass ejection.
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