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Abundance Signatures of Internal Stellar Structure in F Stars

Published online by Cambridge University Press:  19 July 2016

Ann Merchant Boesgaard
Ann Merchant Boesgaard*
Affiliation:
Palomar Observatory and Department of Astronomy, California Institute of Technology

Abstract

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We have determined Li abundances from high resolution, high signal-to-noise spectra near 6700 å of the F dwarfs in several galactic clusters and in the field. The Li-temperature profiles show large Li depletions in the mid–F stars indicating that matter has been circulated (or diffused) downward in the stars. This brings new observational evidence about the details of stellar envelope structure. Li depletions occur in stars with T = 6400–6900 K, with depletions of over an order of magnitude for those with T = 6500–6800 K. The relationship to rotation, galactic Li, and the halo star Li content is discussed.

Type
IV. Spectroscopic Patterns of Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 273 - 278
Copyright
Copyright © Kluwer 1988 

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