Minidisc influence on flow variability in accreting spinning black hole binaries: simulations in full general relativity
Minidisc influence on flow variability in accreting spinning black hole binaries: simulations in full general relativity
复制标题
微型盘对吸积旋转黑洞双星中流动变化的影响：完全广义相对论中的模拟
DOI：
10.1093/mnras/stad091
复制
发表时间：
2023
影响因子：
4.8
通讯作者：
Paschalidis, Vasileios
中科院分区：
文献类型：
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作者：
Bright, Jane C;Paschalidis, Vasileios
我们在完全广义相对论中对吸积的等质量双黑洞进行了磁流体动力学模拟，重点研究了自旋和小圆盘对吸积率和Pointing光度变率的影响。我们报道了小圆盘的结构和小圆盘的质量周期、质量吸积率和坡印亭光度。在我们研究的所有系统中，吸积率表现出与双星轨道频率有关的准周期行为，但这种调制的幅度依赖于持久小盘的存在。特别是，被发现产生持久迷你盘的系统对质量吸积率的调制要弱得多，这表明迷你盘可以增加物质流入黑洞的时间，并抑制准周期行为。这一发现对间隔较大的二进制文件具有潜在的影响，在这种情况下，微型磁盘可能要大得多，并可能显著降低周期。
We perform magnetohydrodynamic simulations of accreting, equal-mass binary black holes in full general relativity focusing on the effect of spin and minidiscs on the accretion rate and Poynting luminosity variability. We report on the structure of the minidiscs and periodicities in the mass of the minidiscs, mass accretion rates, and Poynting luminosity. The accretion rate exhibits a quasi-periodic behaviour related to the orbital frequency of the binary in all systems that we study, but the amplitude of this modulation is dependent on the existence of persistent minidiscs. In particular, systems that are found to produce persistent minidiscs have a much weaker modulation of the mass accretion rate, indicating that minidiscs can increase the inflow time of matter on to the black holes, and dampen out the quasi-periodic behaviour. This finding has potential consequences for binaries at greater separations where minidiscs can be much larger and may dampen out the periodicities significantly.