1National Astronomical Observatories, Chinese Academy of Sciences, Beijing 1000122College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, Beijing 100049
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
摘要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⊙.
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⊙.
WU Zhen-Yu;DU Cui-Hua;MA Jun;ZHOU Xu. Mass of Open Cluster NGC 7789[J]. 中国物理快报, 2009, 26(2): 29701-029701.
WU Zhen-Yu, DU Cui-Hua, MA Jun, ZHOU Xu. Mass of Open Cluster NGC 7789. Chin. Phys. Lett., 2009, 26(2): 29701-029701.
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