标题： 质量传递和双黑洞系统中的玻色子云耗尽 显示英文标题

标题： Mass transfer and boson cloud depletion in a binary black hole system

摘要： 超轻玻色子是暗物质的潜在候选者之一。 如果存在，它可以通过快速旋转的黑洞的超辐射效应产生，提取黑洞的能量和角动量并形成玻色子云。 玻色子云会受到伴星存在的影响，产生丰富的动力学效应并产生特征性的引力波信号。 我们研究了双黑洞系统中玻色子云的动力学，特别是我们开发了一个框架来研究两个黑洞之间的质量转移。 发现占据中心黑洞增长模式的玻色子可以跳转到伴星黑洞的衰减模式，导致云层耗尽。 这种云层耗尽的机制与由伴星引起的共振扰动引起的机制不同。 显示英文摘要

摘要： Ultralight boson is one of the potential candidates for dark matter. If exists, it can be generated by a rapidly rotating black hole via superradiance, extracting the energy and angular momentum of the black hole and forming a boson cloud. The boson cloud can be affected by the presence of a companion star, generating fruitful dynamical effects and producing characteristic gravitational wave signals. We study the dynamics of the boson cloud in a binary black hole system, in particular, we develop a framework to study the mass transfer between two black holes. It is found that bosons occupying the growing modes of the central black hole can jump to the decaying modes of the companion black hole, resulting in cloud depletion. This mechanism of cloud depletion is different from that induced by the resonant perturbation from the companion.