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

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

2000-02-24

arxiv.org/abs/astro-ph/0002461v2

Astronomy and Astrophysics

Astrophysics

5 pages incl figs and tables

Scientific paper

10.1086/308897

The TW Hydrae Association (~55 pc from Earth) is the nearest known region of recent star formation. Based primarily on the Hipparcos catalog, we have now identified a group of 9 or 10 co-moving star systems at a common distance (~45 pc) from Earth that appear to comprise another, somewhat older, association (``the Tucanae Association''). Together with ages and motions recently determined for some nearby field stars, the existence of the Tucanae and TW Hydrae Associations suggests that the Sun is now close to a region that was the site of substantial star formation only 10-40 million years ago. The TW Hydrae Association represents a final chapter in the local star formation history.

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