A NEAR-INFRARED SEARCH FOR BROWN DWARFS IN THE PLEIADES

被引：35
|
作者：
SIMONS, DA
BECKLIN, EE
机构：
[1] CANADA FRANCE HAWAII TELESCOPE CORP,KAMUELA,HI
[2] UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024
来源：
ASTROPHYSICAL JOURNAL | 1992年 / 390卷 / 02期
关键词：
INFRARED-STARS; OPEN CLUSTERS AND ASSOCIATIONS-INDIVIDUAL (PLEIADES); STARS-LOW-MASS; BROWN DWARFS;
D O I：
10.1086/171293
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Deep mosaic imaging of 200 arcmin2 of the Pleiades was conducted at wavelengths of 0.9-mu-m (I band) and 2.2-mu-m (K band) in an effort to find free-floating low-mass cluster members. Control fields outside of the cluster, totalling 75 arcmin2, were also imaged to check the overall significance of the results. Photometry of all detected point sources led to the detection of 22 +/- 10 objects, when compared to the control data set, that lie near the lower Pleiades main sequence. These objects have theoretical masses in the range of approximately 0.1-0.04 M . and are described by a power-law mass distribution (dN/dm is-proportional-to m(alpha)) with a slope of -2.8 +/- 0.5. If the detected objects are true cluster members, their combined mass would contribute significantly to that of the Pleiades.
引用
收藏
页码：431 / 439
页数：9
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