冷棕矮星 Gl 229B 的红外光谱。

Infrared spectrum of the cool brown dwarf Gl 229B.

作者信息

Oppenheimer B R, Kulkarni S R, Matthews K, Nakajima T

机构信息

Palomar Observatory, California Institute of Technology, Pasadena 91125, USA.

出版信息

Science. 1995 Dec 1;270(5241):1478-9. doi: 10.1126/science.270.5241.1478.

DOI:10.1126/science.270.5241.1478

PMID:7491492

Abstract

Spectroscopic measurements of a cool brown dwarf, Gl 229B, reveal absorption features attributable to methane in the near infrared much like those of Jupiter. These features are not seen in any star. The presence of methane indicates that the surface temperature of Gl 229B is below 1000 kelvin. Features attributed to water vapor also indicate that Gl 229B is much cooler than any known star.

摘要

对一颗低温褐矮星格利泽229B进行的光谱测量显示，其在近红外波段有可归因于甲烷的吸收特征，这与木星的情况非常相似。这些特征在任何恒星中都未被观测到。甲烷的存在表明格利泽229B的表面温度低于1000开尔文。归因于水蒸气的特征也表明格利泽229B比任何已知恒星的温度都要低得多。