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arXiv 0912.0260astro-ph.SR
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电子俘获型超新星从核坍缩到冷却过程中的中微子信号

Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling

L. Huedepohl, B. Mueller, H. -Th. Janka, A. Marek, G. G Raffelt

摘要:

对一颗质量为8.8太阳的电子俘获超新星(SN)进行了球对称模拟,模拟了SN从坍缩到爆炸直至形成中的中子星几乎完全去质子化的全过程。由于中微子不透明度中核子-核子关联的存在,演化时间很短,约为9 s。经过一个短暂的吸积增强光度阶段(~200 ms),所有物种的光度均分变得几乎完美,电子反中微子和μ子/τ反中微子的光谱非常相似。我们讨论了中微子驱动的风作为核合成网站和SN中微子的味振荡的后果。

英文摘要:

An 8.8 solar mass electron-capture supernova (SN) was simulated in spherical symmetry consistently from collapse through explosion to nearly complete deleptonization of the forming neutron star. The evolution time of about 9 s is short because of nucleon-nucleon correlations in the neutrino opacities. After a brief phase of accretion-enhanced luminosities (~200 ms), luminosity equipartition among all species becomes almost perfect and the spectra of electron antineutrinos and muon/tau antineutrinos very similar. We discuss consequences for the neutrino-driven wind as a nucleosynthesis site and for flavor oscillations of SN neutrinos.

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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