论文标题
Bardeen-petterson在积累超大质量黑洞二进制方面的效果：一种系统的方法
The Bardeen-Petterson effect in accreting supermassive black-hole binaries: a systematic approach
论文作者
论文摘要
圆盘驱动的迁移是托有气体富含气星系的超级黑孔二进制文件的关键进化阶段。除了促进灵感外，粘性相互作用倾向于将黑洞的旋转与圆盘的轨道角动量对齐。我们提出了对这个问题的批判性和系统研究，也称为Bardeen-Petterson效应。我们设计了一种新的迭代方案，以在相对论框架拖动和二进制伴侣的影响下求解翘曲盘的非线性动力学。我们表征了光盘“临界斜率”的影响，该圆盘标志着不存在固定溶液的参数空间区域。我们发现黑洞旋转到完全排列或关键配置。达到临界的倾斜可能意味着椎间盘在流体动力学模拟中观察到的破裂。我们的发现对于预测超级质量黑洞二进制型进入引力波驱动的机制并通过LISA可检测的自旋构型很重要。
Disc-driven migration is a key evolutionary stage of supermassive black-hole binaries hosted in gas-rich galaxies. Besides promoting the inspiral, viscous interactions tend to align the spins of the black holes with the orbital angular momentum of the disc. We present a critical and systematic investigation of this problem, also known as the Bardeen-Petterson effect. We design a new iterative scheme to solve the non-linear dynamics of warped accretion discs under the influence of both relativistic frame dragging and binary companion. We characterize the impact of the disc "critical obliquity", which marks regions of the parameter space where stationary solutions do not exist. We find that black-hole spins reach either complete alignment or a critical configuration. Reaching the critical obliquity might imply that the disc breaks as observed in hydrodynamical simulations. Our findings are important to predict the spin configurations with which supermassive black-hole binaries enter their gravitational-wave driven regime and become detectable by LISA.
