Apsidal precession, disc breaking and viscosity in warped discs
Apsidal precession, disc breaking and viscosity in warped discs
复制标题
拱盘进动、盘破裂和翘曲盘中的粘度
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
A. King
中科院分区：
文献类型：
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作者：
R. Nealon;C. Nixon;Daniel J. Price;A. King
通过比较三维光滑粒子流体动力学模拟，证明了广义相对论近端进动在翘曲黑洞吸积盘中的重要性。如果忽略近场进动，我们证实了先前提出这一假设的磁流体力学模拟的结果，表明至少在这种情况下，α粘性模型产生的结果与角动量输运是由磁致旋转不稳定性引起的模拟结果非常相似。包括近端进动在内，极大地改变了预测的盘演化。对于厚度足以使倾斜通过弯曲波传输的中等倾斜圆盘，我们发现在圆盘内缘存在一个非零且沿半径振荡的圆盘倾斜，这与已发表的解析结果一致。对于更大的倾斜度，我们发现圆盘破裂。
We demonstrate the importance of general relativistic apsidal precession in warped black hole accretion discs by comparing three-dimensional smoothed particle hydrodynamic simulations in which this effect is first neglected, and then included. If apsidal precession is neglected, we confirm the results of an earlier magnetohydrodynamic simulation which made this assumption, showing that at least in this case the α viscosity model produces very similar results to those of simulations where angular momentum transport is due to the magnetorotational instability. Including apsidal precession significantly changes the predicted disc evolution. For moderately inclined discs thick enough that tilt is transported by bending waves, we find a disc tilt which is non-zero at the inner disc edge and oscillates with radius, consistent with published analytic results. For larger inclinations, we find disc breaking.