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Astron. Astrophys. 351, 635-643 (1999)

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The hot side of the lithium dip - LiBeB abundances beyond the main sequence

Corinne Charbonnel 1 and Suzanne Talon 2,3

1 Laboratoire d'Astrophysique de Toulouse, CNRS UMR5572, OMP, 14, Av. E. Belin, 31400 Toulouse, France
2 Département de Physique, Université de Montréal, Montréal PQ H3C 3J7, Canada
3 CERCA, 5160 Boul. Décarie, Montréal PQ H3X 2H9, Canada

Received 3 August 1999 / Accepted 10 September 1999

Abstract

We extend to the case of A and early-F type stars our study of the transport of matter and angular momentum by wind-driven meridional circulation and shear turbulence. We show that our fully consistent treatment of the same hydrodynamical processes which can account for C and N anomalies in B type stars (Talon et al. 1997) and for the shape of the hot side of the Li dip in the open clusters (Talon & Charbonnel 1998) also explains LiBeB observations in stars with [FORMULA] higher than 7000 K on the main sequence as well as in their evolved counterparts.

Key words: hydrodynamics – turbulence – stars: abundances – stars: interiors – stars: rotation

Send offprint requests to: Corinne Charbonnel (corinne@obs-mip.fr)

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© European Southern Observatory (ESO) 1999

Online publication: November 3, 1999
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