Neutrino fluxes from a core-collapse supernova in a model with three sterile neutrinos

The characteristics of the gravitational collapse of a supernova and the fluxes of active and sterile neutrinos produced during the formation of its protoneutron core have been calculated numerically. The relative yields of active and sterile neutrinos in corematter with different degrees of neutron...

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Bibliographic Details
Published in:Astronomy letters 2016-12, Vol.42 (12), p.800-814
Main Authors: Yudin, A. V., Nadyozhin, D. K., Khruschov, V. V., Fomichev, S. V.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Collapse
Fluxes
Gravitational waves
Initial conditions
Luminosity
Mathematical models
Neutrinos
Observations and Techniques
Physics
Physics and Astronomy
Stars & galaxies
Supernovae
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Summary:The characteristics of the gravitational collapse of a supernova and the fluxes of active and sterile neutrinos produced during the formation of its protoneutron core have been calculated numerically. The relative yields of active and sterile neutrinos in corematter with different degrees of neutronization have been calculated for various input parameters and various initial conditions. A significant increase in the fraction of sterile neutrinos produced in superdense core matter at the resonant degree of neutronization has been confirmed. The contributions of sterile neutrinos to the collapse dynamics and the total flux of neutrinos produced during collapse have been shown to be relatively small. The total luminosity of sterile neutrinos is considerably lower than the luminosity of electron neutrinos, but their spectrum is considerably harder at high energies.
ISSN:1063-7737
1562-6873
DOI:10.1134/S1063773716120070