The lower mass function of young open clusters: clues to (sub)stellar formation

被引：8
|
作者：
Moraux, E [1 ]
Bouvier, J
Clarke, C
机构：
[1] Astron Inst, Cambridge, England
[2] Observ Grenoble, LAOG, Grenoble, France
来源：
ASTRONOMISCHE NACHRICHTEN | 2005年 / 326卷 / 10期
关键词：
stars : low-mass; brown dwarfs; stars : mass function; open clusters and associations : individual (Blanco 1; Pleiades; NGC; 2516; Hyades); stellar dynamics;
D O I：
10.1002/asna.200510464
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the present day mass functions (PDMFs) of 4 young open clusters over a mass range from 30 Jupiter masses to 3M(circle dot). Three of these clusters have been chosen to have a similar age of similar to 100 Myr. Their PDMFs are remarkably similar and are comparable to the field mass function. This suggests little impact of initial conditions (stellar density, metallicity) on the mass distribution and raises some issues concerning the currently debated star and brown dwarf formation theories. The fourth cluster is older (600 Myr) which allow us to investigate the effect of the cluster dynamical evolution on the shape of the mass function.
引用
收藏
页码：985 / 990
页数：6
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