Neutron stars harboring a primordial black hole: Maximum survival time
Neutron stars harboring a primordial black hole: Maximum survival time
复制标题
拥有原始黑洞的中子星：最长生存时间
DOI：
10.1103/physrevd.103.l081303
复制
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：
Baumgarte, Thomas W.;Shapiro, Stuart L.
我们在广义相对论中探索中子星的生存时间，在它们的中心有一个内寄生的，可能是原始的黑洞。对应于最小稳态邦迪吸积率绝热流，我们发现较早的刚性核状态方程（EOSs），我们推导出解析的最大生存时间后，整个星星将被黑洞消耗。我们还表明，这个最大的生存时间只依赖于弱的多变EOSs的刚度，使这个生存时间假设一个几乎普遍的值，仅取决于初始黑洞质量。建立这样一个值对于限制质量范围内的原始黑洞对宇宙暗物质含量的贡献很重要。
We explore in general relativity the survival time of neutron stars that host an endoparasitic, possibly primordial, black hole at their center. Corresponding to the minimum steady-state Bondi accretion rate for adiabatic flow that we found earlier for stiff nuclear equations of state (EOSs), we derive analytically the maximum survival time after which the entire star will be consumed by the black hole. We also show that this maximum survival time depends only weakly on the stiffness for polytropic EOSs with, so that this survival time assumes a nearly universal value that depends on the initial black-hole mass alone. Establishing such a value is important for constraining the contribution of primordial black holes in the mass rangeto the dark-matter content of the Universe.