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Rotation, Activity and Lithium Depletion in the Hyades Late Main Sequence

Published online by Cambridge University Press:  19 July 2016

R. Rebolo  and
J. E. Beckman
R. Rebolo
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.
J. E. Beckman
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.

Abstract

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Selecting stars with previously measured or estimated rotational periods we measured Li equivalent widths in 8 stars of the Hyades late main sequence. Combining our data with literature values, we derive a homogeneous set of Li abundances. Plotting log N(Li) against Rossby number we can separate the effects of temperature and rotation. We find for stars later than F8 increased depletion with longer period, at constant surface temperature. Discounting, as improbable, spurious abundances due to surface activity effects, we give a tentative view of the implications of these results for stellar modelling.

Type
VI. Chemical Composition of Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 469 - 472
Copyright
Copyright © Kluwer 1988 

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