The nature of faint companions to G-type stars from adaptive optics

被引：5
|
作者：
Chakraborty, A [1 ]
Ge, J [1 ]
Debes, JH [1 ]
机构：
[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
来源：
ASTRONOMICAL JOURNAL | 2002年 / 124卷 / 02期
关键词：
instrumentation : high angular resolution; stars; low-mass; brown dwarfs; techniques : photometric;
D O I：
10.1086/341378
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
High spatial resolution (0."30) near-IR photometric observations using the adaptive optics of the Mount Wilson 100 inch (2.5 m) telescope and the Penn State IR Imager and Spectrograph have revealed faint companions to HD 190067 and HIP 13855. HD 190067B is found to be of mass 0.075-0.1 M-circle dot with an age from 0.5 Gyr to a few gigayears. HIP 13855B is a low-mass star (age 100-500 Myr) of mass between 0.1 and 0.2 M-circle dot. Further near-IR spectroscopic observations will be necessary to classify their spectral types precisely.
引用
收藏
页码：1127 / 1131
页数：5
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