On precise ZAMSs, the solar color, and pre-main-sequence lithium depletion

Details On precise ZAMSs, the solar color, and pre-main-sequence lithium depletion On precise ZAMSs, the solar color, and pre-main-sequence lithium depletion

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1451v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Oct. 1989, p. 1451-1471.

Astronomy and Astrophysics

Astronomy

131

Lithium, Main Sequence Stars, Pre-Main Sequence Stars, Semiempirical Equations, Stellar Color, Distance, Dwarf Stars, Hydrogen, Iron, Stellar Models

Scientific paper

This paper describes a semiempirical main-sequence-fitting method for the determination of distances to stellar systems, which uses a ZAMS locus carefully normalized to the sun, and whose shape is defined by a quartic over the color range for (B-V)0 values between 0.2 and 1.0 such that the morphology of the Pleiades C-M diagram is accurately reproduced. Using this technique, distances were derived for a number of star clusters. It was found that the observed depletion of lithium among cool main-sequence stars in the Hyades and Pleiades can be matched quite well by the present models. Calculations also show that the depletion of Li at a fixed T(eff) along the main sequence is a sensitive function of Fe/H.

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