期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 329, 期 2, 页码 L29-L33出版社
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-8711.2002.05093.x
关键词
stars : activity; circumstellar matter; stars : pre-main-sequence; stars : rotation; open clusters and associations : individual : eta Chamaeleontis
A limited-area survey of the eta Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of approximate to9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M approximate to 0.2 M.) primary known in the cluster.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据