Bibcode
Garcia Lopez, R. J.; Rebolo, R.; Martin, E. L.
Referencia bibliográfica
Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 2, p. 518-528
Fecha de publicación:
2
1994
Número de citas
130
Número de citas referidas
106
Descripción
As part of a continuing study of the lithium abundances in pre-main
sequence (PMS) low mass stars, we present Li observations for 13 K-type
and 3 M-type stars belonging to the Pleiades and alpha Persei open
clusters, respectively. We have supplemented our measurements with
previous data taken from the literature and derived abundances in LTE
and NLTE for 27 stars. We confirm that a Li spread exists which is
connected to rotation for stars with approximately 0.7 - 0.9 solar mass:
fast rotators show, in general, more Li than slowly rotating stars by
about one order of magnitude. High rotational velocity seems to inhibit
the PMS Li depletion in these stars. We speculate on several physical
hypotheses to explain this effect. A spread is also present among lower
mass stars, but it does not seem to be related to rotational velocity.
Convective mixing appears to be the dominant process of Li depletion in
the lowest mass range considered in this work.