In the present work, we study the link between rotation and lithium abundance in giant stars of luminosity class III, on the basis of a large sample of single stars of spectral type F, G and K. We shows that giant stars presenting the highest lithium contents, typically stars earlier than G0III, are those with the highest rotation rates, pointing for a dependence of lithium content on rotation, as observed for other luminosity classes. Giant stars later than G0III present, as a rule, the lowest rotation rates and lithium contents. A large spread of about five magnitudes in lithium abundance is observed for the slow rotators. Finally, single giant stars with masses 1.5 < M/Msun <= 2.5 show a clearest trend for a correlation between rotational velocity and lithium abundance.
@article{arxiv.astro-ph/0010273,
title = {Rotation and lithium in single giant stars},
author = {J. R. De Medeiros and J. D. do Nascimento and S. Sankarankutty and J. M. Costa and M. R. G. Maia},
journal= {arXiv preprint arXiv:astro-ph/0010273},
year = {2007}
}
Comments
Latex, accepted for publication in Astronomy and Astrophysics