The Variation of Lithium Equivalent Width in Active Cool Stars

In an attempt to determine whether the lithium Une at 6707 A cornes mainly from the quiet photosphere or from the cooler spots on spotted active stars we have measured Une equivalent widths due to Li and also due to Cal at 6717 A 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.