大质量黑洞双星的LISA探测：种子群和外部反冲的印记
LISA detection of massive black hole binaries: imprint of seed populations and of exterme recoils
摘要：
沿着宇宙结构的层次结构，大质量黑洞的形成、合并和吸积历史所涉及的所有物理过程都可能在未来的空间飞行任务（如LISA）可探测到的引力波上留下印记。我们在这里报告最近的研究结果，通过专门的模拟黑洞建立，旨在了解对LISA观测的影响，这两个成分是至关重要的，在每一个大规模的黑洞形成的情况下，即：（一）的性质和丰富的第一个黑洞种子和（二）合并后的大引力反冲高度旋转的黑洞。我们预测的LISA检测率跨越两个数量级，在3-300事件每年的范围内，这取决于假设的大规模黑洞种子模型的细节。另一方面，大的反冲速度不会显着损害LISA观测的效率。在以丰富的光种子为特征的场景中，检测的数量可能会大幅下降（约60%），但如果种子已经很大和/或相对稀少，检测率基本上不受影响。
英文摘要：
All the physical processes involved in the formation, merging, and accretion history of massive black holes along the hierarchical build--up of cosmic structures are likely to leave an imprint on the gravitational waves detectable by future space--borne missions, such as LISA. We report here the results of recent studies, carried out by means of dedicated simulations of black hole build--up, aiming at understanding the impact on LISA observations of two ingredients that are crucial in every massive black hole formation scenario, namely: (i) the nature and abundance of the first black hole seeds and (ii) the large gravitational recoils following the merger of highly spinning black holes. We predict LISA detection rates spanning two order of magnitude, in the range 3-300 events per year, depending on the detail of the assumed massive black hole seed model. On the other hand, large recoil velocities do not dramatically compromise the efficiency of LISA observations. The number of detections may drop substantially (by ~60%), in scenarios characterized byabundant light seeds, but if seeds are already massive and/or relatively rare, the detection rate is basically unaffected.
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