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The Variation of Lithium Equivalent Width in Active Cool Stars

Published online by Cambridge University Press:  25 April 2016

R. D. Robinson ,
K. Thompson  and
J. L. Innis
R. D. Robinson
Affiliation:
Anglo Australian Observatory, Epping, N.S.W. 2121
K. Thompson
Affiliation:
Department of Physics, Monash University
J. L. Innis
Affiliation:
Department of Physics, Monash University
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Abstract

In an attempt to determine whether the lithium Une at 6707 Å cornes mainly from the quiet photosphere or from the cooler spots on spotted active stars we have measured Une équivalent widths due to Li and also due to Cal at 6717 Å at various rotation phases on three fast rotating stars, AB Doradus, PZ Telescopium and V 1005 Orionis. The results for AB Dor and PZ Tel show there might be some small rotational modulation which can be linked to the best estimate of the spot position from the available photometry. This moduation is less than that expected on the basis of Giampapa’s work on sunspot spectra. The Li and Cal line equivalent widths were found to anticorrelate.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 6 , Issue 4 , 1986 , pp. 500 - 503
Copyright
Copyright © Astronomical Society of Australia 1985

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