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Improved dynamical modelling of the Arches cluster

  • Joowon Lee (a1) and Sungsoo S. Kim (a1) (a2)

Abstract

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.

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References

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Clarkson, W. I., Ghez, A. M., Morris, M. R., et al. 2012, ApJ 751, 132
Espinoza, P. & Selman, F. J., Melnic, J. 2009, A&A 501, 563
Kim, S. S., Figer, D. F., Kudritzki, R. P., & Najarro, F. 2006, ApJ 653, L113
Kim, S. S., Morris, M., & Lee, H. M. 1999, ApJ 525, 22
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Keywords

Improved dynamical modelling of the Arches cluster

  • Joowon Lee (a1) and Sungsoo S. Kim (a1) (a2)

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