ExoPlanet Host Stars Have Abnormally Low Lithium Abundances

Parent Stars of Extrasolar Planets - XIII. Additional Evidence for Li Abundance Anomalies

Authors:

Gonzalez et al

Abstract:

We report the results of our analysis of new high resolution spectra of 37 late-F to early-G dwarf stars for the purpose of deriving their Li abundances. Most of the stars were selected from the large Valenti and Fischer compilation and had unknown Li abundances prior to the present study. When the new data are combined with data from our previous studies on this topic and analyzed in a similar way, we find, again, that stars with planets near the solar temperature are deficient in Li relative to a comparison set of stars. A similar result is obtained when we combine our data with a large database of stellar Li abundances from the literature.