Analytic solutions for neutrino-light curves of core-collapse supernovae

Yudai Suwa, Akira Harada, Ken'Ichiro Nakazato, Kohsuke Sumiyoshi

Research output: Contribution to journalArticlepeer-review

Abstract

Neutrinos are a guaranteed signal from supernova explosions in the Milky Way, and a most valuable messenger that can provide us with information about the deepest parts of supernovae. In particular, neutrinos will provide us with physical quantities, such as the radius and mass of protoneutron stars (PNS), which are the central engine of supernovae. This requires a theoretical model that connects observables such as neutrino luminosity and average energy with physical quantities. Here, we show analytic solutions for the neutrino-light curve derived from the neutrino radiation transport equation by employing the diffusion approximation and the analytic density solution of the hydrostatic equation for a PNS. The neutrino luminosity and the average energy as functions of time are explicitly presented, with dependence on PNS mass, radius, the total energy of neutrinos, surface density, and opacity. The analytic solutions provide good representations of the numerical models from a few seconds after the explosion and allow a rough estimate of these physical quantities to be made from observational data.

Original languageEnglish
Article number013E01
JournalProgress of Theoretical and Experimental Physics
Volume2021
Issue number1
DOIs
Publication statusPublished - Jan 1 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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