Park, S.M., Goodwin, S.P. and Kim, S.S. (2018) The early dynamical evolution of star clusters near the Galactic Centre. Monthly Notices of the Royal Astronomical Society, 478 (1). pp. 183-196. ISSN 0035-8711
Abstract
We examine the dynamical evolution of both Plummer sphere and substructured (fractal) star-forming regions in Galactic Centre (GC) strong tidal fields to see what initial conditions could give rise to an Arches-like massive star cluster by ∼2 Myr. We find that any initial distribution has to be contained within its initial tidal radius to survive, which sets a lower limit of the initial density of the Arches of ∼600 M⊙ pc−3 if the Arches is at 30 pc from the GC, or ∼200 M⊙ pc−3 if the Arches is at 100 pc from the GC. Plummer spheres that survive change little other than to dynamically mass segregate, but initially fractal distributions rapidly erase substructure, dynamically mass segregate and by 2 Myr look extremely similar to initial Plummer spheres, therefore it is almost impossible to determine the initial conditions of clusters in strong tidal fields.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Methods: numerical, stars: formation; Stars: kinematics and dynamics; Galaxy: centre; open clusters and associations: individual: the Arches cluster |
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: | 03 Aug 2018 12:01 |
Last Modified: | 03 Aug 2018 12:01 |
Published Version: | https://doi.org/10.1093/mnras/sty1083 |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/sty1083 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:133015 |