Accretion onto a small black hole at the center of a neutron star
Accretion onto a small black hole at the center of a neutron star
复制标题
吸积到中子星中心的小黑洞上
DOI：
10.1103/physrevd.103.104009
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发表时间：
2021
影响因子：
5
通讯作者：
Shapiro, Stuart L.
中科院分区：
文献类型：
--
作者：
Richards, Chloe B.;Baumgarte, Thomas W.;Shapiro, Stuart L.
我们重新审视了由一颗中子星星组成的系统，在它的中心有一个小的，可能是原始的黑洞，重点是嵌入在一颗非旋转中子星星中的非旋转黑洞。扩展早期的治疗，我们提供了一个分析处理描述的中子星星物质到黑洞的长期吸积率，采用相对论邦迪吸积形式主义的刚性状态方程，我们在其他地方提出。我们用这些吸积率来勾画系统的演化分析，直到中子星星被完全消耗。我们还进行了数值模拟，在完整的广义相对论的质量高达9个数量级小于中子星星质量的黑洞，包括模拟的整个演变，通过崩溃的最大黑洞质量。我们构建这些模拟的相对论性的初始数据，通过推广黑洞穿刺的方法，允许物质的存在，并发展这些数据与代码，是最佳的设计，以解决这个问题中存在的巨大不同的长度尺度。我们比较我们的分析和数值计算结果，并提供表达式的中子星窝藏这样的endopassistant黑洞的寿命。
We revisit the system consisting of a neutron star that harbors a small, possibly primordial, black hole at its center, focusing on a nonspinning black hole embedded in a nonrotating neutron star. Extending earlier treatments, we provide an analytical treatment describing the rate of secular accretion of the neutron star matter onto the black hole, adopting the relativistic Bondi accretion formalism for stiff equations of state that we presented elsewhere. We use these accretion rates to sketch the evolution of the system analytically until the neutron star is completely consumed. We also perform numerical simulations in full general relativity for black holes with masses up to nine orders of magnitude smaller than the neutron star mass, including a simulation of the entire evolution through collapse for the largest black hole mass. We construct relativistic initial data for these simulations by generalizing the black hole puncture method to allow for the presence of matter, and evolve these data with a code that is optimally designed to resolve the vastly different length scales present in this problem. We compare our analytic and numerical results, and provide expressions for the lifetime of neutron stars harboring such endoparasitic black holes.