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首页> 外文期刊>The Astrophysical journal >DYNAMICS AND NEUTRINO SIGNAL OF BLACK HOLE FORMATION IN NONROTATING FAILED SUPERNOVAE. I. EQUATION OF STATE DEPENDENCE
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DYNAMICS AND NEUTRINO SIGNAL OF BLACK HOLE FORMATION IN NONROTATING FAILED SUPERNOVAE. I. EQUATION OF STATE DEPENDENCE

机译：非旋转失败的超新星中黑洞形成的动力学和中微子信号。 I.状态依赖方程

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We study black hole formation and the neutrino signal from the gravitational collapse of a nonrotating massive star of 40 M_☉. Adopting two different sets of realistic equations of state (EOSs) for dense matter, we perform numerical simulations of general relativistic ν-radiation hydrodynamics under spherical symmetry. We make comparisons of core bounce, shock propagation, evolution of nascent proto-neutron stars, and the resulting recollapse to a black hole to reveal the influence of EOSs. We also explore the influence of EOSs on neutrino emission during the evolution toward black hole formation. We find that the speed of contraction of the nascent proto-neutron star, whose mass increases quickly due to the intense accretion, is different depending on the EOS and that the resulting profiles of density and temperature differ significantly. The black hole formation occurs at 0.6-1.3 s after bounce, when the proto-neutron star exceeds its maximum mass, which is crucially determined by the EOS. We find that the average energies of neutrinos increase after bounce because of rapid temperature increase, but at different speeds depending on the EOS. The duration of neutrino emission up to black hole formation is found to be different according to different recollapse timing. These characteristics of neutrino signatures are distinguishable from those for ordinary proto-neutron stars in successful core-collapse supernovae. We discuss the idea that a future detection of neutrinos from a black hole-forming collapse will contribute to revealing the black hole formation and to constraining the EOS at high density and temperature.
机译：我们研究了一个40M_☉的非旋转大质量恒星的重力坍塌所产生的黑洞和中微子信号。对于稠密物质，采用两组不同的现实状态方程（EOS），我们在球对称下对广义相对论ν辐射流体动力学进行了数值模拟。我们对核弹跳，激波传播，新生中子星的演化以及由此产生的重新塌陷至黑洞进行比较，以揭示EOS的影响。我们还探讨了EOS对黑洞形成演化过程中中微子发射的影响。我们发现，新生的中子星的收缩速度因EOS的不同而有所不同，而新生中子星的收缩速度因强积聚而迅速增加，并且所得的密度和温度曲线也有很大差异。当原始中子星超过其最大质量时，黑洞的形成在反弹后的0.6-1.3 s内发生，这由EOS决定。我们发现，由于温度的快速升高，中微子的平均能量在弹跳后会增加，但是根据EOS的不同，速度会有所不同。发现中微子发射到黑洞形成的持续时间根据不同的再塌陷时间而不同。在成功的核塌陷超新星中，中微子签名的这些特征与普通原中子星的区别。我们讨论的想法是，将来从黑洞形成的塌陷中检测到中微子将有助于揭示黑洞的形成，并有助于在高密度和高温下限制EOS。

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