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Improved dynamical modelling of the Arches cluster

Published online by Cambridge University Press:  22 May 2014

Joowon Lee
Affiliation:
School of Space Research, Kyung Hee University, Yongin, Gyeonggi, 446-701, Korea email: jwlee9033@khu.ac.kr
Sungsoo S. Kim
Affiliation:
School of Space Research, Kyung Hee University, Yongin, Gyeonggi, 446-701, Korea email: jwlee9033@khu.ac.kr Department of Astronomy and Space Science, Kyung Hee University, Yongin, Gyeonggi, 446-701, Korea
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Abstract

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Recently, Clarkson et al. (2012) measured the intrinsic velocity dispersion of the Arches cluster, a young and massive star cluster in the Galactic center. Using the observed velocity dispersion profile and the surface brightness profile of Espinoza et al. (2009), they estimate the cluster's present-day mass to be ∼ 1.5×104 M by fitting an isothermal King model. In this study, we trace the best-fit initial mass for the Arches cluster using the same observed data set and also the anisotropic Fokker-Planck calculations for the dynamical evolution.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

References

Clarkson, W. I., Ghez, A. M., Morris, M. R., et al. 2012, ApJ 751, 132Google Scholar
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Kim, S. S., Morris, M., & Lee, H. M. 1999, ApJ 525, 22Google Scholar