The sensitivity of presupernova neutrinos to stellar evolution models
arXiv:2005.03124 · doi:10.1093/mnras/staa1738
Abstract
We examine the sensitivity of neutrino emissions to stellar evolution models for a 15 progenitor, paying particular attention to a phase prior to the collapse. We demonstrate that the number luminosities in both electron-type neutrinos () and their anti-partners () 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 neutrino luminosity can be well characterized by these central quantities. This analysis also reveals that the most influential quantity to the time evolution of luminosity is matter density, while it is temperature for . These qualitative trends will be useful and applicable to constrain the physical state 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.
arXiv comment13 pages, 12 figures, submitted to MNRAS
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