arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2103.02268astro-ph.HEnucl-th
收藏

核塌缩超新星中强子-夸克相变的祖子依赖性

Progenitor Dependence of Hadron-quark Phase Transition in Failing Core-collapse Supernovae

Shuai Zha, Evan P. O'Connor, André da Silva Schneider

摘要:

我们研究了失败的核心坍缩超新星(CCSNe)中强子-夸克相变(PT)的后果,这些超新星产生了恒星质量的黑洞(BH)。我们进行了一套中微子输运广义相对论流体动力学模拟在球对称的21祖模型和混合状态方程(EoS),包括强子和夸克。我们发现PT对CCSN后反弹动力学的影响是反弹紧性参数$ξ_{2.2}$的函数。对于$ξ_{2.2}\gtrsim0.24$,PT导致原致密星(PCS)的第二次动力学坍缩。对于具有$ξ_{2.2}\gtrsim0.51$的模型,BH形成在第二次崩溃之后立即开始,而对于具有$0.24\lesssimξ_{2.2}\lesssim0.51$的模型,PCS经历第二次反弹和振荡。这些模型在第二次反弹后数十ms内发射出周期为$\sim$ ms的强振荡中微子信号,如果将来检测到,这可能是PT未通过CCSNe的强有力指标。然而,在我们的球对称模拟中,没有激波复活发生,BH形成不可避免地发生。此外,通过PCS的质量特定熵演化图,可以通过PT诱导的大熵下出现的第三族致密星的出现来理解祖先依赖性。

英文摘要:

We study the consequences of a hadron-quark phase transition (PT) in failing core-collapse supernovae (CCSNe) which give birth to stellar-mass black holes (BH). We perform a suite of neutrino-transport general-relativistic hydrodynamic simulations in spherical symmetry with 21 progenitor models and a hybrid equation of state (EoS) including hadrons and quarks. We find that the effect of the PT on the CCSN postbounce dynamics is a function of the bounce compactness parameter $ξ_{2.2}$. For $ξ_{2.2}\gtrsim0.24$, the PT leads to a second dynamical collapse of the protocompact star (PCS). While BH formation starts immediately after this second collapse for models with $ξ_{2.2}\gtrsim0.51$, the PCS experiences a second bounce and oscillations for models with $0.24\lesssimξ_{2.2}\lesssim0.51$. These models emit potent oscillatory neutrino signals with a period of $\sim$ms for tens of ms after the second bounce, which can be a strong indicator of the PT in failing CCSNe if detected in the future. However, no shock revival occurs and BH formation inevitably takes place in our spherically-symmetric simulations. Furthermore, via a diagram of mass-specific entropy evolution of the PCS, the progenitor dependence can be understood through the appearance of third-family of compact stars emerging at large entropy induced by the PT.

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。

↑