Searching for weather in brown dwarfs

被引：76

作者：

Tinney, CG

Tolley, AJ

机构：

[1] Anglo Australian Observ, Epping, NSW 1710, Australia

[2] Univ Oxford Jesus Coll, Oxford OX1 3DW, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 304卷 / 01期

关键词：

methods : observational; techniques : spectroscopic; stars : activity; stars : atmospheres; stars; low-mass; brown dwarfs; stars : rotation;

D O I：

10.1046/j.1365-8711.1999.02297.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used an innovative tunable filter technique to carry out a search for the variability signatures of meteorological processes in the atmospheres of two nearby brown dwarfs. We find no evidence for variability in the L-type brown dwarf DENIS-P J1228-1547 in observations spanning approximately half a rotation period (3 h), and evidence for variability in the M-type brown dwarf LP 944-20 in multiple observations spanning approximately one third of a rotation period (1.5 h).

引用

页码：119 / 126

页数：8

共 27 条

[1] Synthetic spectra and mass determination of the brown dwarf Gliese 229B [J].