Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.7808m&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #78.08; Bulletin of the American Astronomical Society, Vol. 31, p.1488
Other
Scientific paper
The eta Chamaeleontis open cluster is a newly-discovered (Mamajek, Lawson & Feigelson 1999, ApJL, 516, 77) young ( 8 Myr) compact (< 1 pc extent) cluster of 13 known systems at a distance of 97 pc. It is the fourth-closest compact cluster, and the second-closest grouping of T Tauri stars following the TW Hydrae association. Remarkably, proper motion analysis suggests a common origin for eta Cha and TW Hya, and other isolated young stars across the greater Cha region, in the Sco-Cen OB association 10 Myr ago. We conclude the Sco-Cen association is vastly greater in extent than previously recognised; eta Cha and TW Hya are situated 30 deg. either side of the Lower Centarus-Crux subgroup. eta Cha and TW Hya are unlikely to be unique structures.
Feigelson Eric D.
Lawson Warrick A.
Mamajek Eric E.
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