Age spreads in clusters and associations: the lithium test

Details Age spreads in clusters and associations: the lithium test Age spreads in clusters and associations: the lithium test

2004-12-09

arxiv.org/abs/astro-ph/0412213v1

Astronomy and Astrophysics

Astrophysics

to appear in IMF@50: The Initial Mass Function 50 years later, eds. E. Corbelli et al. (Kluwer Acad. Press), 2004, in press

Scientific paper

We report the evidence that several low-mass stars (<~0.4 Msun) of the Orion
and Upper Scorpius clusters have lithium abundances well below the interstellar
value. Due to time-dependent depletion, our result implies stellar ages greater
than ~5 Myr, suggesting that star formation has been proceeding for a long time
in these systems.

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