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Issue A&A
Volume 377, Number 1, October I 2001
Page(s) 84 - 89
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20010482



A&A 377, 84-89 (2001)
DOI: 10.1051/0004-6361:20010482

Rotation-induced lithium depletion of solar-type stars in open stellar clusters

R. Tschäpe and G. Rüdiger

Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

(Received 1 March 2000 / Accepted 26 March 2001)

Abstract
We look for a correlation between Lithium abundance and rotation period in solar-type stars (G0... K0). The result is not unambiguous. Stars in young open clusters (IC 2391, IC 2602, IC 4665, $\alpha$ Per) do not show any correlation, in the Pleiades cluster a correlation is present: the faster the rotation the less the Lithium depletion. Moreover, there is statistical evidence, that at least in the Pleiades and in the $\alpha$ Persei cluster the abundance spread at fixed color in cool stars could be due to rotation. The use of the inverse Rossby number instead of the rotation rate does not improve on the Li-rotation correlation.


Key words: stars: abundances -- stars: evolution -- stars: rotation -- open clusters and associations: individual: Pleiades, Hyades, $\alpha$ Per, IC 2391, IC 2602, IC 4665

Offprint request: R. Tschäpe, rtschaepe@aip.de

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