潮汐扰动恒星与大质量黑洞碰撞产生的引力波
Gravitational waves from the collision of tidally disrupted stars with massive black holes
摘要：
我们使用流体动力学的模拟，再加上充分的广义相对论调查的引力波产生的恒星碰撞时，一个大质量的黑洞的恒星的潮汐扰动半径位于远离黑洞的视界。我们考虑主序星和白矮星压缩星，和非旋转的黑洞，以及那些接近极端的自旋。我们研究的制度之间的恒星可以准确地模拟一个点粒子，潮汐效应完全抑制的引力波信号。我们发现，不可忽略的引力波可以产生，即使当恒星是强烈的潮汐力的影响，以及当它与大的角动量碰撞。我们讨论的影响，这些结果有潜在的观察引力波从这些来源与未来的探测器。
英文摘要：
We use simulations of hydrodynamics coupled with full general relativity to investigate the gravitational waves produced by a star colliding with a massive black hole when the star's tidal disruption radius lies far outside of the black hole horizon. We consider both main-sequence and white-dwarf compaction stars, and nonspinning black holes, as well as those with near-extremal spin. We study the regime in between where the star can be accurately modeled by a point particle, and where tidal effects completely suppress the gravitational wave signal. We find that nonnegligible gravitational waves can be produced even when the star is strongly affected by tidal forces, as well as when it collides with large angular momentum. We discuss the implications that these results have for the potential observation of gravitational waves from these sources with future detectors.
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