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The effect of stellar-mass black holes on the structural evolution of massive star clusters

Mackey, A.D. (author)
Wilkinson, M.I. (author)
Davies, Melvyn B (author)
Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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Gilmore, G.F. (author)
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 (creator_code:org_t)
Oxford University Press (OUP), 2007
2007
English.
In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 1365-2966 .- 1745-3925 .- 1745-3933. ; 379, s. 40-44
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We present the results of realistic N-body modelling of massive star clusters in the Magellanic Clouds, aimed at investigating a dynamical origin for the radius-age trend observed in these systems. We find that stellar-mass black holes, formed in the supernova explosions of the most massive cluster stars, can constitute a dynamically important population. If a significant ensemble is retained (here we assume complete retention), these objects rapidly form a dense core where interactions are common, resulting in the scattering of black holes into the cluster halo, and the ejection of black holes from the cluster. These two processes heat the stellar component, resulting in prolonged core expansion of a magnitude matching the observations. Significant core evolution is also observed in Magellanic Cloud clusters at early times. We find that this does not result from the action of black holes, but can be reproduced by the effects of mass-loss due to rapid stellar evolution in a primordially mass-segregated cluster.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

methods: N-body simulations
globular clusters: general
stellar dynamics
Magellanic Clouds

Publication and Content Type

art (subject category)
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Mackey, A.D.
Wilkinson, M.I.
Davies, Melvyn B
Gilmore, G.F.
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NATURAL SCIENCES
NATURAL SCIENCES
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