Hubble Space Telescope astrometric observations of the metal-poor spectroscopic binary HD 20039

被引：2
|
作者：
Osborn, W [1 ]
Hershey, JL
机构：
[1] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA
[2] Space Telescope Sci Inst, Comp Sci Corp, Astron Program, Baltimore, MD 21218 USA
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1999年 / 111卷 / 759期
关键词：
D O I：
10.1086/316354
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An attempt has been made to spatially resolve the metal-poor, double-lined spectroscopic binary HD 20039 with the Hubble Space Telescope Fine Guidance System. Astrometric measurements of the system to complement the spectroscopic orbit would permit the distance and the masses of the components to be determined. Observations were obtained around the times of predicted maximum separation on both sides of the orbit, but the system was not resolved. The resulting upper limit on the separation indicates that the distance to HD 20039 is significantly larger than expected from its assumed classification as a subdwarf.
引用
收藏
页码：566 / 570
页数：5
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