The stellar mass spectrum in the young populous cluster NGC 1866

被引：6
|
作者：
van den Bergh, S [1 ]
机构：
[1] Natl Res Council Canada, Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V8X 4M6, Canada
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1999年 / 111卷 / 764期
关键词：
D O I：
10.1086/316438
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The young populous cluster NGC 1866 in the Large Magellanic Cloud (LMC), which is probably one of the most massive objects formed in the LMC during the last similar to 3 Gyr, appears to have an unexpectedly high mass-to-light ratio. From its velocity dispersion Fischer and coworkers find its mass to be (1.35 +/- 0.25) x 10(5) M.. The luminosity of this cluster is M-v = - 8.93 +/- 0.13, corresponding to L-v = (3.2 +/- 0.4) x 10(5) L-v,L-.. This yields M/L-v = 0.42 +/- 0.09 in solar units. For a cluster of age 0.1 Gyr, such a relatively high mass-to-light ratio requires a mass spectrum with an exponent x = 1.72 +/- 0.09, or x = 1.75 +/- 0.09 if mass loss by evolving stars is taken into account.
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收藏
页码：1248 / 1250
页数：3
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