Allison, R.J., Goodwin, S.P., Parker, R.J. et al. (2 more authors) (2010) The early dynamical evolution of cool, clumpy star clusters. Monthly Notices of the Royal Astronomical Society, 407 (2). pp. 1098-1107. ISSN 0035-8711
Abstract
Observations and theory both suggest that star clusters form sub-virial (cool) with highly sub-structured distributions. We perform a large ensemble of N-body simulations of moderate-sized (N = 1000) cool, fractal clusters to investigate their early dynamical evolution. We find that cool, clumpy clusters dynamically mass segregate on a short timescale, that Trapezium-like massive higher-order multiples are commonly formed, and that massive stars are often ejected from clusters with velocities > 10 km s−1 (c.f. the average escape velocity of 2.5 km s−1 ). The properties of clusters also change rapidly on very short timescales. Young clusters may also undergo core collapse events, in which a dense core containing massive stars is hardened due to energy losses to a halo of lower-mass stars. Such events can blow young clusters apart with no need for gas expulsion. The warmer and less substructured a cluster is initially, the less extreme its evolution.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2010 The Authors. Journal compilation © 2010 RAS. This is an author produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | methods: N-body simulations; stars: formation; stars: kinematics and dynamics |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 Aug 2017 11:43 |
Last Modified: | 25 Mar 2018 08:58 |
Published Version: | https://doi.org/10.1111/j.1365-2966.2010.16939.x |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1111/j.1365-2966.2010.16939.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:120257 |