Discovery of the lowest mass brown dwarf in the Pleiades

被引：27

作者：

Cossburn, MR

Hodgkin, ST

Jameson, RF

Pinfield, DJ

机构：

[1] Department of Physics and Astronomy, Leicester University, Leicester LE1 7RH, University Road

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1997年 / 288卷 / 01期

关键词：

stars; low mass; brown dwarfs; open clusters and associations; individual; Pleiades;

D O I：

10.1093/mnras/288.1.L23

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have imaged the Pleiades open cluster at I and Z in a search for low-mass stars and brown dwarfs. One very red object, which we have called PIZ 1, at I=19.64, I-Z=1.33 has been detected within an area of 100 arcmin(2). Follow-up infrared photometry verifies that this object is extremely red with a K magnitude of 15.5. We have also obtained a spectrum which exhibits the spectral features indicative of an extremely cool M dwarf. We estimate the effective temperature and mass of PIZ 1 to be 2300 K and 0.038 M., respectively.

引用

页码：L23 / L27

页数：5

共 20 条

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