DENIS-P J1228.2-1547 - A new benchmark brown dwarf

被引：55

作者：

Tinney, CG ^{[1
]}

Delfosse, X ^{[1
]}

Forveille, T ^{[1
]}

机构：

[1] OBSERV GRENOBLE,F-38041 GRENOBLE,FRANCE

来源：

ASTROPHYSICAL JOURNAL | 1997年 / 490卷 / 01期

基金：

奥地利科学基金会; 匈牙利科学研究基金会; 巴西圣保罗研究基金会;

关键词：

stars; low-mass; brown dwarfs;

D O I：

10.1086/311011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present optical spectroscopy of three brown dwarf candidates identified in the first 1% of the DENIS sky survey. Low-resolution spectra from 6430 to 9150 Angstrom show these objects to have similar spectra to the brown dwarf candidate GD 165B. High-resolution spectroscopy shows that one of the objects-DENIS-P J1228.2-1547-has a strong 2.3 +/- 0.05 Angstrom equivalent width absorption line of Li I lambda 6708 and is therefore a brown dwarf with mass below 0.065 M., and age less than or similar to 1.5 Gyr. DENIS-P J1228.2-1547 can now be considered a prototype for brown dwarfs closer to the hydrogen-burning limit than G1 229B.

引用

页码：L95 / L98

页数：4

共 24 条

[1]

ALLARD F, 1998, IN PRESS ASP C SER

[2] Lithium in brown dwarf candidates: The mass and age of the faintest Pleiades stars [J].