Determination of substellar mass function of young open clusters using 2MASS and GSC data

被引：0
|
作者：
Tej, A [1 ]
Sahu, KC
Chandrasekhar, T
Ashok, NM
机构：
[1] Observ Astron, F-67000 Strasbourg, France
[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[3] Phys Res Lab, Ahmedabad 380009, Gujarat, India
来源：
BROWN DWARFS | 2003年 / 211期
关键词：
D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a statistical method to derive the mass functions of open clusters using sky survey data such as the 2 Micron All Sky Survey (2MASS) and the Guide Star Catalogue (GSC). We have used this method to derive the mass functions in the stellar/substellar regime of three young, nearby open clusters, namely IC 348, sigma Orionis and Pleiades. The mass function in the low mass range (M < 0.50 M-circle dot) is appreciably flatter than the stellar Salpeter function for all three open clusters. The contribution of objects below 0.5 M-circle dot to the total mass of the cluster is similar to40% and the contribution of objects below 0.08 M-circle dot to the total is similar to4%.
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页码：175 / 178
页数：4
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