Lithium Abundances in 11 Solar-type Stars

Details Lithium Abundances in 11 Solar-type Stars Lithium Abundances in 11 Solar-type Stars

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.277..565q&link_type=abstract

Astrophysics and Space Science, v. 277, Issue 4, p. 565-577 (2001).

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

We present determinations of fundamental parameters and lithium abundances in eleven solar-type stars through observations of the Li I λ6707.8Å. The correlations between the abundance of lithium and that of other elements (Ca, K and Fe) are also discussed. The analysis of our data indicates that the maximum lithium abundance decreases with decreasingT eff, and also decreases with increasing age. The sun is just one of the stars with low lithium abundance. One of the sample stars shows a high lithium abundance of as much as 2.34 dex. The plot of lithium abundance versus [Ca/H] is similar to that versus [Fe/H]. Lithium seems depleted more quickly than potassium in the cool solar-type stars. The correlation between the lithium abundance and the other stellar characteristics, such as absolute visual magnitude, does not seem very strong. The large scatter present at each color cannot be uniquely attributed to different initial compositions or to pure age effect. Other complex mechanisms may exist to provide different amounts of lithium depletion for stars with properties similar to the sun.

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