Black holes, disks, and jets following binary mergers and stellar collapse: The narrow range of electromagnetic luminosities and accretion rates
Black holes, disks, and jets following binary mergers and stellar collapse: The narrow range of electromagnetic luminosities and accretion rates
复制标题
双星合并和恒星塌缩后的黑洞、盘和喷流：电磁光度和吸积率的狭窄范围
DOI：
10.1103/physrevd.95.101303
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发表时间：
2017
影响因子：
5
通讯作者：
Shapiro, Stuart L.
中科院分区：
文献类型：
--
作者：
Shapiro, Stuart L.
我们对中子星星和黑洞-中子星星合并以及超大质量恒星的磁旋转坍缩进行了广义相对论下的磁流体动力学模拟。在许多情况下，结果是一个旋转的黑洞（BH）沉浸在磁化的磁盘中，并从BH的两极发出喷流。虽然它们的形成场景不同，它们的BH质量，以及它们的磁盘质量，密度和磁场强度，变化的数量级，这些功能合谋产生喷流坡印亭光度，都在同一个，狭窄的范围内。一个类似的结果适用于它们的BH吸积率在喷气发动机，这是。我们提供了一个简单的模型来解释这些意想不到的发现。有趣的是，这些光度位于同一个狭窄的范围内，表征了观察到的400多个短和长GRB的光度分布，这些GRB的距离是从光谱红移或宿主星系推断的。这一结果，连同模型预测的伽玛暴寿命，支持的信念，一个紧凑的二元合并是SGRB的祖先，而一个大规模的恒星磁旋转崩溃是一个LGRB的祖先。
We have performed magnetohydrodynamic simulations in general relativity of binary neutron star and binary black hole-neutron star mergers, as well as the magnetorotational collapse of supermassive stars. In many cases the outcome is a spinnng black hole (BH) immersed in a magnetized disk, with a jet emanating from the poles of the BH. While their formation scenarios differ and their BH masses, as well as their disk masses, densities, and magnetic field strengths, vary by orders of magnitude, these features conspire to generate jet Poynting luminosities that all lie in the same, narrow range of. A similar result applies to their BH accretion rates upon jet launch, which is. We provide a simple model that explains these unanticipated findings. Interestingly, these luminosities reside in the same narrow range characterizing the observed luminosity distributions of over 400 short and long GRBs with distances inferred from spectroscopic redshifts or host galaxies. This result, together with the GRB lifetimes predicted by the model, supports the belief that a compact binary merger is the progenitor of an SGRB, while a massive, stellar magnetorotational collapse is the progenitor of an LGRB.