DETECTION OF SHOCKED MOLECULAR-HYDROGEN IN INFRARED COMPANIONS TO T-TAURI STARS - EVIDENCE FOR ONGOING ACCRETION

被引：28

作者：

HERBST, TM ^{[1
]}

KORESKO, CD ^{[1
]}

LEINERT, C ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 444卷 / 02期

关键词：

ACCRETION; ACCRETION DISKS; BINARIES; CLOSE; CIRCUMSTELLAR MATTER; INFRARED; STARS; PRE-MAIN-SEQUENCE;

D O I：

10.1086/187868

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of the 2.12 mu m, upsilon = 1-0 S(1) emission line of molecular hydrogen spatially confined to the infrared companions of the Hare 6-10 and UY Aur binary systems. The primaries in both sources appear to be relatively normal pre-main-sequence stars. The K-band spectrum of the Hare 6-10 companion is unusually red and displays no characteristic stellar features. The UY Aur infrared companion, on the other hand, is undoubtedly a star. Our nondetection of the upsilon = 2-1 S(1) line of H-2 implies line ratios inconsistent with a fluorescent origin for the emission and suggests that it is produced by shock heating. These observations strengthen the view that the infrared companions are experiencing ongoing accretion.

引用

页码：L93 / L96

页数：4

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