Roles of Fast Neutrino-Flavor Conversion on the Neutrino-Heating Mechanism of Core-Collapse Supernova
Hiroki Nagakura
Abstract
One of the greatest uncertainties in any modeling of the inner engine of core-collapse supernova (CCSN) is neutrino-flavor conversions driven by neutrino self-interactions. We carry out large-scale numerical simulations of a multienergy, multiangle, three-flavor framework and general relativistic quantum kinetic neutrino transport in spherical symmetry with an essential set of neutrino-matter interactions under a realistic fluid profile of CCSN. Our result suggests that the neutrino heating in the gain region is reduced by ∼40% due to fast neutrino-flavor conversion (FFC). We also find that the total luminosity of neutrinos is enhanced by ∼30%, for which the substantial increase of heavy-leptonic neutrinos by FFCs are mainly responsible. This study provides evidence that FFC has a significant impact on the delayed neutrino-heating mechanism.