Bibcode
Barrado y Navascues, D.; de Castro, E.; Fernandez-Figueroa, M. J.; Cornide, M.; Garcia Lopez, R. J.
Bibliographical reference
Astronomy and Astrophysics, v.337, p.739-753 (1998)
Advertised on:
9
1998
Journal
Citations
27
Refereed citations
25
Description
We present a study of the lithium abundances of a sample of evolved
components of Chromospherically Active Binary Systems. We show that a
significant part of them have lithium excesses, independently of their
mass and evolutionary stage. Therefore, it can be concluded that Li
abundance does not depend on age for giant components of CABS. These
overabundances appear to be closely related to the stellar rotation, and
we interpret them as a consequence of the transfer of angular momentum
from the orbit to the rotation as the stars evolve in and off the Main
Sequence, in a similar way as it happens in the dwarf components of the
same systems and in the Tidally Locked Binaries belonging to the Hyades
and M67. Based on observations collected with the 2.2,m telescope of
the German-Spanish Observatorio de Calar Alto (Almeria, Spain), and with
the 2.56,m Nordic Optical Telescope in the Spanish Observatorio del
Roque de los Muchachos of the Instituto de Astrof\'i sica de Canarias
(La Palma, Spain)