The sensitivity of presupernova neutrinos to stellar evolution models

Chinami Kato, Ryosuke Hirai, Hiroki Nagakura

Research output: Contribution to journalArticlepeer-review

Abstract

We examine the sensitivity of neutrino emission to stellar evolution models for a 15 M progenitor, paying particular attention to a phase prior to the collapse. We demonstrate that the number luminosities in both electron-type neutrinos (νe) and their antipartners (¯ νe) differ by more than an order of magnitude by changing spatial resolutions and nuclear network sizes on stellar evolution models. We also develop a phenomenological model to capture the essential trend of the diversity, in which neutrino luminosities are expressed as a function of central density, temperature, and electron fraction. In the analysis, we show that the neutrino luminosity can be well characterized by these central quantities. This analysis also reveals that the most influential quantity to the time evolution of νe luminosity is matter density, while it is temperature for ν¯e. These qualitative trends will be useful and applicable to constrain the physical states of progenitors at the final stages of stellar evolution from future neutrino observations, although more detailed systematic studies including various mass progenitors are required to assess the applicability.

Original languageEnglish
Pages (from-to)3961-3972
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Volume496
Issue number3
DOIs
Publication statusPublished - 2020

Keywords

  • Neutrinos
  • Stars: evolution
  • Stars: massive
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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