2MASSW J0746425+200322: Is the secondary a star or brown dwarf?

被引：10

作者：

Gizis, JE ^{[1
]}

Reid, IN

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA

来源：

ASTRONOMICAL JOURNAL | 2006年 / 131卷 / 01期

关键词：

binaries : general; stars : fundamental parameters; stars : individual (2MASSWJ0746425+200322); stars; low-mass; brown dwarfs;

D O I：

10.1086/498262

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

2MASSW J0746425+200322 is the first L dwarf system with a dynamical mass determination. It has been claimed that the system is young (< 500 Myr) and that therefore the secondary is clearly substellar. We argue that the balance of evidence suggests the system is old; the secondary is likely either a star or a long-lived transition object.

引用

页码：638 / 639

页数：2

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