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mocca-survey Database I: Binary black hole mergers from globular clusters with intermediate mass black holes

Hong, Jongsuk ; Askar, Abbas LU orcid ; Giersz, Mirek ; Hypki, Arkadiusz and Yoon, Suk-jin (2020) In Monthly Notices of the Royal Astronomical Society 498(3). p.4287-4294
Abstract
The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also increases with the density. To explore the impact of the formation and growth of IMBHs on the population of stellar mass black hole binaries from globular clusters, we analyse the existing large survey of Monte Carlo globular cluster simulation data (mocca-survey Database I). We show that the number of binary black hole mergers agrees with the prediction based on clusters’ initial properties when the IMBH mass is not massive enough or the IMBH seed forms at a later time. However, binary black hole formation... (More)
The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also increases with the density. To explore the impact of the formation and growth of IMBHs on the population of stellar mass black hole binaries from globular clusters, we analyse the existing large survey of Monte Carlo globular cluster simulation data (mocca-survey Database I). We show that the number of binary black hole mergers agrees with the prediction based on clusters’ initial properties when the IMBH mass is not massive enough or the IMBH seed forms at a later time. However, binary black hole formation and subsequent merger events are significantly reduced compared to the prediction when the present-day IMBH mass is more massive than ∼104M⊙ or the present-day IMBH mass exceeds about 1 per cent of cluster’s initial total mass. By examining the maximum black hole mass in the system at the moment of black hole binary escaping, we find that ∼90 per cent of the merging binary black holes escape before the formation and growth of the IMBH. Furthermore, large fraction of stellar mass black holes are merged into the IMBH or escape as single black holes from globular clusters in cases of massive IMBHs, which can lead to the significant underpopulation of binary black holes merging with gravitational waves by a factor of 2 depending on the clusters’ initial distributions. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Monthly Notices of the Royal Astronomical Society
volume
498
issue
3
pages
4287 - 4294
publisher
Oxford University Press
external identifiers
  • scopus:85096945741
ISSN
0035-8711
DOI
10.1093/mnras/staa2677
language
English
LU publication?
yes
id
1f7f7406-c3ef-43cb-8308-5877f5314b89
date added to LUP
2020-10-19 22:22:31
date last changed
2024-04-17 17:10:54
@article{1f7f7406-c3ef-43cb-8308-5877f5314b89,
  abstract     = {{The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also increases with the density. To explore the impact of the formation and growth of IMBHs on the population of stellar mass black hole binaries from globular clusters, we analyse the existing large survey of Monte Carlo globular cluster simulation data (mocca-survey Database I). We show that the number of binary black hole mergers agrees with the prediction based on clusters’ initial properties when the IMBH mass is not massive enough or the IMBH seed forms at a later time. However, binary black hole formation and subsequent merger events are significantly reduced compared to the prediction when the present-day IMBH mass is more massive than ∼104M⊙ or the present-day IMBH mass exceeds about 1 per cent of cluster’s initial total mass. By examining the maximum black hole mass in the system at the moment of black hole binary escaping, we find that ∼90 per cent of the merging binary black holes escape before the formation and growth of the IMBH. Furthermore, large fraction of stellar mass black holes are merged into the IMBH or escape as single black holes from globular clusters in cases of massive IMBHs, which can lead to the significant underpopulation of binary black holes merging with gravitational waves by a factor of 2 depending on the clusters’ initial distributions.}},
  author       = {{Hong, Jongsuk and Askar, Abbas and Giersz, Mirek and Hypki, Arkadiusz and Yoon, Suk-jin}},
  issn         = {{0035-8711}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{3}},
  pages        = {{4287--4294}},
  publisher    = {{Oxford University Press}},
  series       = {{Monthly Notices of the Royal Astronomical Society}},
  title        = {{mocca-survey Database I: Binary black hole mergers from globular clusters with intermediate mass black holes}},
  url          = {{https://lup.lub.lu.se/search/files/85702159/staa2677.pdf}},
  doi          = {{10.1093/mnras/staa2677}},
  volume       = {{498}},
  year         = {{2020}},
}