Neutrino spectrum and energy loss rates due to weak processes on hot Fe in pre-supernova environment
arXiv:2306.16055 · doi:10.3390/particles6030041
Abstract
Applying TQRPA calculations of Gamow--Teller strength functions in hot nuclei, we compute the (anti)neutrino spectra and energy loss rates arising from weak processes on hot Fe under pre-supernova conditions. We use a realistic pre-supernova model calculated by the stellar evolution code MESA. Taking into account both charged and neutral current processes, we demonstrate that weak reactions with hot nuclei can produce high-energy (anti)neutrinos. We also show that, for hot nuclei, the energy loss via (anti)neutrino emission is significantly larger than that for nuclei in their ground state. It is found that the neutral current de-excitation via the -pair emission is presumably a dominant source of antineutrinos. In accordance with other studies, we confirm that the so-called single-state approximation for neutrino spectra might fail under certain pre-supernova conditions. }
arXiv comment11 pages, 6 figures. This article belongs to the Special Issue Infinite and Finite Nuclear Matter (INFINUM)
References in corpus (14)
- Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
- Theory of Core-Collapse Supernovae
- On Variations Of Pre-Supernova Model Properties
- Neutrino-nucleus reactions and their role for supernova dynamics and nucleosynthesis
- Gamow-Teller strength distributions at finite temperatures and electron capture in stellar environments
- Neutrinos from beta processes in a presupernova: probing the isotopic evolution of a massive star
- Presupernova neutrinos: realistic emissivities from stellar evolution
- Neutrino spectra from stellar electron capture
- Unblocking of stellar electron capture for neutron-rich nuclei at finite temperature
- Theoretical prediction of presupernova neutrinos and their detection
- Thermal QRPA with Skyrme interactions and supernova neutral-current neutrino-nucleus reactions
- Inelastic neutrino scattering off hot nuclei in supernova environments
- Nuclear neutrino energy spectra in high temperature astrophysical environments
- Neutrino absorption by hot nuclei in supernova environments