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Initial Dynamical Evolution of Star Clusters with Tidal Field

Published online by Cambridge University Press:  31 March 2017

So-Myoung Park ,
Simon P. Goodwin  and
Sungsoo S. Kim
So-Myoung Park
Affiliation:
School of Space Research, Kyung Hee University, 1732, Deogyeong-daero, Yongin-si 446-701, South Korea email: smpark12@khu.ac.kr
Simon P. Goodwin
Affiliation:
Dept. of Physics & Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom email: s.goodwin@sheffield.ac.uk
Sungsoo S. Kim
Affiliation:
School of Space Research, Kyung Hee University, 1732, Deogyeong-daero, Yongin-si 446-701, South Korea email: smpark12@khu.ac.kr Dept. of Astronomy & Space Science, Kyung Hee University, 1732, Deogyeong-daero, Yongin-si 446-701, South Korea email: sungsoo.kim@khu.ac.kr
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Abstract

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Observations have been suggested that star clusters could form from the rapid collapse and violent relaxation of substructured distributions. We investigate the collapse of fractal stellar distributions in no, weak, and very strong tidal fields. We find that the rapid collapse of substructure into spherical clusters happens quickly with no or a weak tidal field, but very strong tidal fields prevent a cluster forming. However, we also find that dense Plummer spheres are also rapidly destroyed in strong tidal fields. We suggest that this is why the low-mass star clusters cannot survive near the galactic centre which has strong tidal field.

Keywords

Galaxy: open clusters and associations: generalGalaxy: centerGalaxy:kinematics and dynamicsmethods: n-body simulations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 261 - 262
Copyright
Copyright © International Astronomical Union 2017 

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