Molecular hydrogen emission from discs in the η Chamaeleontis cluster

被引：22
作者：
Howat, S. K. Ramsay
Greaves, J. S.
机构：
[1] UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland
[2] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 379卷 / 04期
基金：
英国科学技术设施理事会;
关键词：
circumstellar matter; planetary systems : formation; infrared : stars;
D O I：
10.1111/j.1365-2966.2007.12049.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Discs in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H-2. Around the M3 star ECHA J0843.3-7905, we detect circumstellar gas orbiting at similar to 2 au. If the gas is ultraviolet excited, the ro-vibrational line traces a hot gas layer supported by a disc of mass similar to 0.03M(circle dot), similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and the inwards migration of gas giant planets.
引用
收藏
页码：1658 / 1664
页数：7
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