Roles of fast neutrino-flavor conversion on the neutrino-heating mechanism of core-collapse supernova

TL;DR

This study uses advanced simulations to show that fast neutrino-flavor conversions significantly alter neutrino heating and luminosity in core-collapse supernovae, impacting the explosion mechanism.

Contribution

It provides the first large-scale, multi-energy, multi-angle quantum kinetic simulation demonstrating the impact of fast neutrino-flavor conversions in supernova models.

Findings

Neutrino heating is reduced by about 40% due to FFC.

Total neutrino luminosity increases by approximately 30%.

Heavy-leptonic neutrinos are substantially increased by FFCs.

Abstract

One of the greatest uncertainties in any modeling of inner engine of core-collapse supernova (CCSN) is neutrino flavor conversions driven by neutrino self-interactions. We carry out large-scale numerical simulations of multi-energy, multi-angle, 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 $\sim 40\%$ due to fast neutrino-flavor conversion (FFC). We also find that the total luminosity of neutrinos is enhanced by $\sim 30 \%$, 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.