THE OB-ASSOCIATION LH-58 IN THE LARGE MAGELLANIC CLOUD

被引:39
|
作者
GARMANY, CD
MASSEY, P
PARKER, JW
机构
[1] NATL OPT ASTRON OBSERV,KITT PEAK NATL OBSERV,TUCSON,AZ 85726
[2] NASA,GODDARD SPACE FLIGHT CTR,ASTROPHYS & SPACE ASTRON LAB,GREENBELT,MD 20771
来源
ASTRONOMICAL JOURNAL | 1994年 / 108卷 / 04期
关键词
D O I
10.1086/117151
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present CCD photometry and spectroscopy for stars in Lucke-Hodge 58, an isolated OB association in the Large Magellanic Cloud (LMC) northwest of 30 Doradus. The photometric catalog contains 839 stars with UBV magnitudes complete to V approximate to 19. We have obtained spectra and classified 35 stars; combined with previous published spectral types, we find 22 O-type stars. The earliest type is 03-4 V, and there are three WR stars in the association. The slope of the initial mass function, Gamma=-1.7+/-0.3, is in good agreement with other LMC associations. The presence of several evolved supergiants with masses about 15-25.M(circle dot) suggests that some star formation took place as early as 10 million years ago, but the majority of stars formed coevally within the past few million years.
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页码:1256 / 1265
页数:10
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