Tearing up a misaligned accretion disc with a binary companion
Tearing up a misaligned accretion disc with a binary companion
复制标题
用双星伴星撕裂未对准的吸积盘
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Daniel J. Price
中科院分区：
文献类型：
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作者：
S. Dougan;C. Nixon;A. King;Daniel J. Price
吸积盘在双星系统中很常见，它们经常被发现相对于双星轨道不对准。来自伴星的引力力矩在未对准的圆盘轨道上引起节点进动。我们计算这个进动是否足够强到足以克服传递角动量的内部盘力矩。对于典型的参数，进动胜出：圆盘分裂成不同的平面，有效地独立进动。我们运行流体力学模拟来检查这些结果，并确认盘破裂是普遍存在的，并且通常会增强对中心物体的吸积。这适用于许多天体物理吸积的情况，例如超大质量黑洞双星和X射线双星。
Accretion discs are common in binary systems, and they are often found to be misaligned with respect to the binary orbit. The gravitational torque from a companion induces nodal precession in misaligned disc orbits. We calculate whether this precession is strong enough to overcome the internal disc torques communicating angular momentum. For typical parameters precession wins: the disc breaks into distinct planes that precess effectively independently. We run hydrodynamical simulations to check these results, and confirm that disc breaking is widespread and generally enhances accretion on to the central object. This applies in many cases of astrophysical accretion, e.g. supermassive black hole binaries and X–ray binaries.
混沌恒星的形成以及恒星旋转与盘和行星轨道轴的对齐
DOI：
10.1111/j.1365-2966.2009.15773.x
发表时间：
2010
影响因子：
4.8
作者：
Bate M
通讯作者：
Bate M