期刊
ASTROPHYSICAL JOURNAL
卷 892, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/ab7921
关键词
Galactic center; Intermediate-mass black holes
资金
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ERC-2014-STG [638435]
- Hungarian National Research, Development, and Innovation Office [NK-FIH KH125675]
- National Science Foundation [NSF PHY-1748958]
- NSERC
Although their existence is not yet confirmed observationally, intermediate-mass black holes (IMBHs) may play a key role in the dynamics of galactic nuclei. In this paper, we neglect the effect of the nuclear star cluster itself and investigate only how a small reservoir of IMBHs influences the secular dynamics of stellar-mass black hole binaries, using N-body simulations. We show that our simplifications are valid and that the IMBHs significantly enhance binary evaporation by pushing the binaries into the Hill-unstable region of parameter space, where they are separated by the supermassive black hole's tidal field. For binaries in the S-cluster region of the Milky Way, IMBHs drive the binaries to merge in up to 1%-6% of cases, assuming five IMBHs within 5 pc of mass 104 M. each. Observations of binaries in the Galactic center may strongly constrain the population of IMBHs therein.
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