Identification of a nearby stellar association in the Hipparcos catalog: Implications for recent, local star formation

Citation
B. Zuckerman et Ra. Webb, Identification of a nearby stellar association in the Hipparcos catalog: Implications for recent, local star formation, ASTROPHYS J, 535(2), 2000, pp. 959-964
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004-637X → ACNP
Volume
535
Issue
2
Year of publication
2000
Part
1
Pages
959 - 964
Database
ISI
SICI code
0004-637X(20000601)535:2<959:IOANSA>2.0.ZU;2-I
Abstract
The TW Hydrae Association (similar to 55 pc from Earth) is the nearest know n region of recent star formation. Based primarily on the Hipparcos catalog , we have identified a group of nine or 10 comoving star systems at a commo n distance (similar to 45 pc) from Earth that appear to comprise another, s omewhat older association ("the Tucanae Association"). Together with ages a nd motions recently determined for some nearby field stars, the existence o f the Tucanae and TW Hydrae Associations suggests that the Sun is now dose to a region that was the site of substantial star formation only 10-50 Myr ago. The TW Hydrae Association represents a final chapter in the local star formation history.