Chin. Phys. Lett.  2009, Vol. 26 Issue (2): 029701    DOI: 10.1088/0256-307X/26/2/029701
GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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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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.
Keywords: 97.10.Xq      98.20.Di     
Received: 19 September 2008      Published: 20 January 2009
PACS:  97.10.Xq (Luminosity and mass functions)  
  98.20.Di (Open clusters in the Milky Way)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/2/029701       OR      https://cpl.iphy.ac.cn/Y2009/V26/I2/029701
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