Binary black-hole mergers in magnetized disks: simulations in full general relativity.
Binary black-hole mergers in magnetized disks: simulations in full general relativity.
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磁化盘中的二元黑洞合并：完全广义相对论的模拟。
DOI：
10.1103/physrevlett.109.221102
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发表时间：
2012
影响因子：
8.6
通讯作者：
S. Shapiro
中科院分区：
文献类型：
--
作者：
B. Farris;R. Gold;V. Paschalidis;Z. Etienne;S. Shapiro
我们提出的结果，从第一个完全广义相对论，磁流体动力学（MHD）模拟的等质量黑洞二进制（BHBH）在磁化，circumbinary吸积盘。我们模拟前和postdecoupling阶段的BHBH磁盘系统和“冷却”和“无冷却”的气体流动。在解耦之前，由于MHD湍流，双星潮汐力矩和有效粘性力矩之间的竞争耗尽了双星轨道内部的盘。然而，它也诱导双流吸积流和温和的相对论极性流出的黑洞。在退耦之后，但在气体填充残骸周围的低密度“空洞”之前，吸积率降低，而在合并之后，由于冲击加热和吸积到旋转的BH残骸上，电磁光度迅速增强。这项调查，虽然初步的，预览更详细的广义相对论，MHD模拟，我们计划在未来的预期，同时检测引力和电磁辐射合并BHBH磁盘系统进行。
We present results from the first fully general relativistic, magnetohydrodynamic (MHD) simulations of an equal-mass black-hole binary (BHBH) in a magnetized, circumbinary accretion disk. We simulate both the pre- and postdecoupling phases of a BHBH-disk system and both "cooling" and "no-cooling" gas flows. Prior to decoupling, the competition between the binary tidal torques and the effective viscous torques due to MHD turbulence depletes the disk interior to the binary orbit. However, it also induces a two-stream accretion flow and mildly relativistic polar outflows from the BHs. Following decoupling, but before gas fills the low-density "hollow" surrounding the remnant, the accretion rate is reduced, while there is a prompt electromagnetic luminosity enhancement following merger due to shock heating and accretion onto the spinning BH remnant. This investigation, though preliminary, previews more detailed general relativistic, MHD simulations we plan to perform in anticipation of future, simultaneous detections of gravitational and electromagnetic radiation from a merging BHBH-disk system.