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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2108.03009 (astro-ph)
[Submitted on 6 Aug 2021 (v1), last revised 31 Jan 2022 (this version, v2)]

Title:Observing Supernova Neutrino Light Curves with Super-Kamiokande. II. Impact of the Nuclear Equation of State

Authors:Ken'ichiro Nakazato, Fumi Nakanishi, Masayuki Harada, Yusuke Koshio, Yudai Suwa, Kohsuke Sumiyoshi, Akira Harada, Masamitsu Mori, Roger A. Wendell
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Abstract:The late-time evolution of the neutrino event rate from supernovae is evaluated for Super-Kamiokande using simulated results of proto-neutron star (PNS) cooling. In the present work we extend the result of Suwa et al. (2019) [arXiv:1904.09996], which studied the dependence on the PNS mass, but focus on the impact of the nuclear equation of state (EOS). We find that the neutrino event rate depends on both the high-density and low-density EOS, where the former determines the radius of the PNS and the latter affects its surface temperature. Based on the present evaluation of the neutrino event rate we propose a new analysis method to extract the time variability of the neutrino average energy taking into account the statistical error in the observation.
Comments: 22 pages, 15 figures, accepted for publication in ApJ. The supernova neutrino data computed in this study are available at this https URL
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: RIKEN-iTHEMS-Report-21
Cite as: arXiv:2108.03009 [astro-ph.HE]
  (or arXiv:2108.03009v2 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2108.03009
Journal reference: Astrophys.J.925:98,2022
Related DOI: https://doi.org/10.3847/1538-4357/ac3ae2

Submission history

From: Ken'ichiro Nakazato [view email]
[v1] Fri, 6 Aug 2021 08:57:25 UTC (4,165 KB)
[v2] Mon, 31 Jan 2022 04:29:57 UTC (4,170 KB)
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