Tidal capture of stars by intermediate-mass black holes

Baumgardt, H., Hopman, C., Zwart, S. Portegies and Makino, J. (2006) Tidal capture of stars by intermediate-mass black holes. Monthly Notices of the Royal Astronomical Society, 372 1: 467-478. doi:10.1111/j.1365-2966.2006.10885.x

Author Baumgardt, H.
Hopman, C.
Zwart, S. Portegies
Makino, J.
Title Tidal capture of stars by intermediate-mass black holes
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
Publication date 2006-10
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2006.10885.x
Open Access Status DOI
Volume 372
Issue 1
Start page 467
End page 478
Total pages 12
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
Formatted abstract
Recent X-ray observations and theoretical modelling have made it plausible that some ultraluminous X-ray sources (ULX) are powered by intermediate-mass black holes (IMBHs). N-body simulations have also shown that for certain initial conditions runaway merging of stars happens in dense star clusters, which could lead to the formation of IMBHs. In the present paper we have performed N-body simulations of young clusters such as MGG-11 of M82 in which IMBHs form through runaway merging. We took into account the effect of tidal energy dissipation of stars passing close to the IMBH to study the tidal capture and disruption of stars by IMBHs. In our simulations, IMBHs have a high chance of capturing stars through tidal energy dissipation within a few core relaxation times. For ~30 per cent of our runs a ULX is formed through tidal capture within 7–12 Myr, consistent with the age limits of MGG-11. Our results strengthen the case for some ULX being powered by IMBHs.
Keyword Black hole physics
Stellar dynamics
Globular clusters : general
X-Ray Sources
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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