期刊
ASTRONOMY & ASTROPHYSICS
卷 495, 期 1, 页码 147-155出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/200809886
关键词
open clusters and associations: general; methods: statistical
资金
- FCT, Portugal [SFRH/BD/13355/2003, POCTI/CFEAST/55691/2004]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/13355/2003] Funding Source: FCT
Aims. We investigate the validity of the mass segregation indicators commonly used in analysing young stellar clusters. Methods. We simulate observations by constructing synthetic seeing-limited images of a 1000 massive clusters (10(4) M-circle dot) with a standard IMF and a King-density distribution function. Results. We find that commonly used indicators are highly sensitive to sample incompleteness in observational data and that radial completeness determinations do not provide satisfactory corrections, rendering the studies of radial properties highly uncertain. On the other hand, we find that, under certain conditions, the global completeness can be estimated accurately, allowing for the correction of the global luminosity and mass functions of the cluster. Conclusions. We argue that there is currently no observational evidence of mass segregation in young compact clusters since there is no robust way to differentiate between true mass segregation and sample incompleteness effects. Caution should then be exercised when interpreting results from observations as evidence of mass segregation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据