The evolution of kicked stellar-mass black holes in star cluster environments - II. Rotating star clusters
The evolution of kicked stellar-mass black holes in star cluster environments - II. Rotating star clusters
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星团环境中踢出的恒星质量黑洞的演化 - II。
DOI:
10.1093/mnras/stz1896
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发表时间:
2019
影响因子:
4.8
通讯作者:
Trani, Alessandro A
中科院分区:
文献类型:
--
作者:
Webb, Jeremy J;Leigh, Nathan W;Serrano, Roberto;Bellovary, Jillian;Ford, K E;McKernan, Barry;Spera, Mario;Trani, Alessandro A
In this paper, we continue our study on the evolution of black holes (BHs) that receive velocity kicks at the origin of their host star cluster potential. We now focus on BHs in rotating clusters that receive a range of kick velocities in different directions with respect to the rotation axis. We performN-body simulations to calculate the trajectories of the kicked BHs and develop an analytic framework to study their motion as a function of the host cluster and the kick itself. Our simulations indicate that for a BH that is kicked outside of the cluster’s core, as its orbit decays in a rotating cluster the BH will quickly gain angular momentum as it interacts with stars with high rotational frequencies. Once the BH decays to the point where its orbital frequency equals that of local stars, its orbit will be circular and dynamical friction becomes ineffective since local stars will have low relative velocities. After circularization, the BH’s orbit decays on a longer time-scale than if the host cluster was not rotating. Hence BHs in rotating clusters will have longer orbital decay times. The time-scale for orbit circularization depends strongly on the cluster’s rotation rate and the initial kick velocity, with kicked BHs in slowly rotating clusters being able to decay into the core before circularization occurs. The implication of the circularization phase is that the probability of a BH undergoing a tidal capture event increases, possibly aiding in the formation of binaries and high-mass BHs.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
N. Lutzgendorf;H. Baumgardt;J. Kruijssen
通讯作者:
J. Kruijssen
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Arca;R. Capuzzo
通讯作者:
R. Capuzzo
影响因子:
4.8
作者:
M. Arca-Sedda
通讯作者:
M. Arca-Sedda
影响因子:
4.8
作者:
J. Webb;N. Leigh;Roberto Serrano;J. Bellovary;K. Ford;B. McKernan;M. Spera;A. Trani
通讯作者:
A. Trani
DOI:
10.1086/163785
发表时间:
1986
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Weinberg
通讯作者:
M. Weinberg