论文标题
潮汐耗散对恒星簇中恒星和黑洞之间二进制single的结果的影响
Influence of tidal dissipation on outcomes of binary-single encounters between stars and black holes in stellar clusters
论文作者
论文摘要
在密集的恒星簇的岩心中,经常会发生二进制和单星之间的紧密重力相遇。使用海啸代码,我们计算了涉及两个黑洞(BHS)和一颗星星的大量二进制相互作用的结果,以检查如何通过潮汐消散引起的轨道能量损失可以改变这些混乱相互作用的结果。首先对每种相互作用进行模拟,而无需任何耗散过程,然后我们系统地添加了由于重力波发射(使用牛顿后(PN)校正)和动态潮汐而导致的轨道能量损失,并重新计算了相互作用。我们发现,潮汐的包含将BH-Star合并的数量增加多达75%,但不会影响BH-BH合并的数量。这些结果强调了由于在几个体内遇到时动态潮汐而引起的轨道能量耗散以及在恒星群集模拟中近距离二元系统的演变的重要性。与以前的研究一致,我们发现PN项的包含增加了二进制遇到过程中BH-BH合并的数量。但是,BH-Star合并在很大程度上不受包含这些术语的影响。
In the cores of dense stellar clusters, close gravitational encounters between binary and single stars can frequently occur. Using the Tsunami code, we computed the outcome of a large number of binary-single interactions involving two black holes (BHs) and a star to check how the inclusion of orbital energy losses due to tidal dissipation can change the outcome of these chaotic interactions. Each interaction was first simulated without any dissipative processes and then we systematically added orbital energy losses due to gravitational wave emission (using post-Newtonian (PN) corrections) and dynamical tides and recomputed the interactions. We find that the inclusion of tides increases the number of BH-star mergers by up to 75 per cent but it does not affect the number of BH-BH mergers. These results highlight the importance of including orbital energy dissipation due to dynamical tides during few-body encounters and evolution of close binary systems within stellar cluster simulations. Consistent with previous studies, we find that the inclusion of PN terms increases the number of BH-BH mergers during binary-single encounters. However, BH-star mergers are largely unaffected by the inclusion of these terms.