Fast collective neutrino oscillations inside the neutrino sphere in core-collapse supernovae
Fast collective neutrino oscillations inside the neutrino sphere in core-collapse supernovae
复制标题
核心塌陷超新星中微子球内的快速集体中微子振荡
DOI：
10.1103/physrevd.101.023018
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发表时间：
2020
影响因子：
5
通讯作者：
Sumiyoshi Kohsuke
中科院分区：
文献类型：
--
作者：
Delfan Azari Milad;Yamada Shoichi;Morinaga Taiki;Nagakura Hiroki;Furusawa Shun;Harada Akira;Okawa Hirotada;Iwakami Wakana;Sumiyoshi Kohsuke
中微子被认为在核心坍缩超新星的爆炸机制中起着关键作用，因为它们携带了大质量星星引力坍缩释放的大部分能量。如果它们的味道在中微子球内快速转换，超新星爆炸可能会受到影响。本文是我们以前的文件的扩展工作的结果报告。我们进行了一个彻底的调查，电子轻子数（ELN）交叉在我们的自洽，现实的玻尔兹曼模拟在两个空间维度下的轴对称的交叉之间的存在和角分布，或ELN交叉。本文首次报道了在大质量星星核心深处中微子球附近的正探测结果。我们发现，低值的电子fractionproduced对流运动与轻元素的外观是至关重要的，以引起ELN交叉，通过提高质子和中子之间的化学势差，从而减轻费米简并。由于正探测区域是持续的，事实上，随着时间的推移而扩大，它可能会对核心坍缩超新星的爆炸，观测中微子天文学和重核的核合成产生影响。
Neutrinos are believed to have a key role in the explosion mechanism of core-collapse supernovae as they carry most of the energy released by the gravitational collapse of a massive star. If their flavor is converted fast inside the neutrino sphere, the supernova explosion may be influenced. This paper is reporting the results of the extended work of our previous paper. We perform a thorough survey of the electron lepton number (ELN) crossing in one of our self-consistent, realistic Boltzmann simulations in two spatial dimensions under axisymmetry for the existence of the crossings betweenandangular distributions, or the ELN crossing. We report for the first time the positive detections deep inside the core of the massive star in the vicinity of neutrino sphere at. We find that low values of the electron fractionproduced by convective motions together with the appearance of light elements are critically important to give rise to the ELN crossing by enhancing the chemical potential difference between proton and neutron, and hence by mitigating the Fermi-degeneracy of. Since the region of positive detection are sustained and, in fact, expanding with time, it may have an impact on the explosion of core-collapse supernovae, observational neutrino astronomy, and nucleosynthesis of heavy nuclei.