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 |
|
Cite this article: |
WU Zhen-Yu, DU Cui-Hua, MA Jun et al 2009 Chin. Phys. Lett. 26 029701 |
|
|
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)
|
|
|
|
|
[1] Wu Z Y Shu C G and Chen W P 2003 Chin. Phys. Lett. 20 1648 [2] Gieles M Athanassoula E and Portegies Zwart S F 2007 Mon. Not. R. Astron. Soc. 376 809 [3] Lamers H J G L M and Gieles M 2006 Astron.Astrophys. 455 L17 [4] Piskunov A E et al 2007 Astron. Astrophys. 468 151 [5] de Grijs R et al 2008 Mon. Not. R. Astron. Soc.Accepted [6] Kouwenhoven M B N and de Grijs R 2008 Astron.Astrophys. 480 103 [7] Wu Z Y et al 2007 Astrophys. J. 133 2061 [8] Wu Z Y et al 2006 Publ. Astron. Soc. Pacific. 118 1104 [9] Kroupa P 2001 Mon. Not. R. Astron. Soc. 322231 [10] Spitzer L 1987 Dynamical Evolution of GlobularClusters (Princeton, NJ: Princeton University Press) [11] King I 1962 Astrophys. J. 67 471 [12] Monet D G et al 2003 Astrophys. J. 125 984 [13] Bonnarel F et al 2000 Astron. Astrophys. 14333 [14] Gim M et al 1998 Publ. Astron. Soc. Pacific. 110 1172 [15] Pryor C and Meylan G 1993 ASP Conf. Ser. 50357 [16] Innanen K A, Harris W E and Webbink R F 1983 Astrophys. J. 88 338 [17] Keenan D W 1981 Astron. Astrophys. 95 340 [18] Wu Z Y et al 2008 Mon. Not. R. Astron. Soc.(submitted) [19] Wu Z Y Zhou X and Ma J 2004 Chin. Phys. Lett. 21 418 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|