arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.2900astro-ph.HEnucl-th
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失败超新星中的超子物质与黑洞形成

Hyperon Matter and Black Hole Formation in Failed Supernovae

Ken'ichiro Nakazato, Shun Furusawa, Kohsuke Sumiyoshi, Akira Ohnishi, Shoichi Yamada, Hideyuki Suzuki

摘要:

我们研究了黑洞形成失败的超新星中超子的出现,这是由非旋转大质量恒星的动力学坍缩引起的。我们采用真实的超声波状态方程(EOS)在广义相对论中进行中微子辐射流体动力学模拟。在吸引和排斥两种情况下,研究了超子的势能。由于超子软化了状态方程,它们缩短了从反弹到黑洞形成的时间间隔,这对应于中微子发射的持续时间。这种效应在吸引的情况下比排斥的情况下更大,因为双超子更容易出现。此外,我们研究了π介子的影响,发现它们也促进了朝向黑洞形成的坍缩。

英文摘要:

We investigate the emergence of hyperons in black-hole-forming failed supernovae, which are caused by the dynamical collapse of nonrotating massive stars. We perform neutrino-radiation hydrodynamical simulations in general relativity adopting realistic hyperonic equation-of-state (EOS). Attractive and repulsive cases are examined for the potential of Σ hyperons. Since hyperons soften the EOS, they shorten the time interval from the bounce to black hole formation, which corresponds to the duration of neutrino emission. This effect is larger for the attractive case than the repulsive case because Σ hyperons appear more easily. In addition, we investigate the impacts of pions to find that they also promotes the recollapse towards the black hole formation.

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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