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CHAOTIC LOSS CONES AND BLACK HOLE FUELING

机译:混乱的损失锥体和黑洞感觉

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摘要

In classical loss cone theory, stars are supplied to a central black hole via gravitational scattering onto low angular momentum orbits. Higher feeding rates are possible if the gravitational potential near the black hole is nonaxisymmetric and the orbits are chaotic. Motivated by recently published, self-consistent models, we evaluate rates of stellar capture and disruption in triaxial nuclei. Rates are found to substantially exceed those in colli-sionally resupplied loss cones, as long as an appreciable fraction of the orbits are centrophilic. The mass captured by a black hole after a given time in a steep (ρ ~ r~(-2)) nucleus scales as σ~5 with σ the stellar velocity dispersion, and the accumulated mass in 10~(10) yr is of the correct order to reproduce the M_·-σ relation. Triaxiality can solve the "final parsec problem" of decaying black hole binaries by increasing the flux of stars into the binary's loss cone.
机译:在经典的损失锥理论中,恒星通过重力散射被提供到一个中心黑洞,该黑洞位于低角动量轨道上。如果黑洞附近的重力势是非轴对称的并且轨道是混乱的,则可能有更高的进给速度。根据最近发布的自洽模型,我们评估了三轴核中恒星捕获和破坏的速率。只要轨道的相当一部分是向心性的,则发现速率大大超过了人工补给的损失锥。在给定的时间后,黑洞在陡峭的(ρ〜r〜(-2))原子核中捕获的质量缩放为σ〜5,且星速分布为σ,在10〜(10)yr的累积质量为重现M_·-σ关系的正确顺序。三轴性可以通过增加进入双星损耗锥的恒星通量来解决黑洞双星衰变的“最终差距问题”。

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