标题： 一个超大质量逆向双星在吸积盘中的演化 显示英文标题

标题： The evolution of a supermassive retrograde binary embedded in an accretion disk

摘要： 在本文中，我们讨论了对一个质量比为q的非等质量双星系统在吸积盘中的研究的主要结果，其轨道旋转方向与盘的旋转方向相反。 当质量比足够大时，盘中会形成一个空洞，但空洞形成的机制与顺行情况有很大不同。 内迁发生在时间尺度t_ev ~ M_p/(dot M)上，其中M_p是较轻组分（扰动体）的质量，dot M是吸积率。 当q<< 1时，吸积主要发生在更重的组分上，扰动体上的吸积率小于或约为q^(1/3)M。然而，当考虑超大质量双黑洞时，该吸积率会增加，此时引力波辐射变得重要。 我们估计了扰动体吸积和引力波可能被探测到的时间持续期。 显示英文摘要

摘要： In this note we discuss the main results of a study of a massive binary with unequal mass ratio, q, embedded in an accretion disk, with its orbital rotation being opposed to that of the disk. When the mass ratio is sufficiently large, a gap opens in the disk, but the mechanism of gap formation is very different from the prograde case. Inward migration occurs on a timescale of t_ev ~ M_p/(dot M), where M_p is the mass of the less massive component (the perturber), and dot M is the accretion rate. When q<< 1, the accretion takes place mostly onto the more massive component, with the accretion rate onto the perturber being smaller than, or of order of, q^(1/3)M. However, this rate increases when supermassive binary black holes are considered and gravitational wave emission is important. We estimate a typical duration of time for which the accretion onto the perturber and gravitational waves could be detected.