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arXiv 2108.03009astro-ph.HEastro-ph.SRhep-phnucl-th
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用Super-Kamiokande观测超新星中微子光变曲线。II。核物质状态方程的影响

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

Ken'ichiro Nakazato, Fumi Nakanishi, Masayuki Harada, Yusuke Koshio, Yudai Suwa, Kohsuke Sumiyoshi, Akira Harada, Masamitsu Mori, Roger A. Wendell

摘要:

利用原中子星(PNS)冷却的模拟结果,对Super-Kamiokande超新星中微子事件率的后期演化进行了评估。在本工作中,我们扩展了Suwa等人的结果。(2019)[arXiv:1904.09996],该结果研究了对PNS质量的依赖性,但重点关注核物质状态方程(EOS)的影响。我们发现中微子事件率同时依赖于高密度和低密度状态方程,前者决定PNS的半径,后者影响其表面温度。基于目前对中微子事件率的评估,我们提出了一种新的分析方法来提取中微子平均能量的时间变化,考虑到观测中的统计误差。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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