| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Mass of Open Cluster NGC 7789 |
| WU Zhen-Yu1, DU Cui-Hua2, MA Jun1, ZHOU Xu1 |
| 1National Astronomical Observatories, Chinese Academy of Sciences, Beijing 1000122College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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WU Zhen-Yu, DU Cui-Hua, MA Jun et al 2009 Chin. Phys. Lett. 26 029701 |
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Abstract Mass of open cluster NGC 7789 in the Galaxy is determined by three methods: the photometric method based on mass-luminosity relations of stars in the cluster Mpho=7712.5M⊙; the dynamical method based on virial theorem Mvir=6996.1M⊙; and the tidal radius method based on the interaction between the cluster and the Galaxy Mtid=5152.5M⊙. The mean mass of this cluster is estimated to be Mc=6620.4±762.5M⊙.
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| Keywords:
97.10.Xq
98.20.Di
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Received: 19 September 2008
Published: 20 January 2009
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| PACS: |
97.10.Xq
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(Luminosity and mass functions)
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98.20.Di
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(Open clusters in the Milky Way)
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