AAS 205th Meeting, 9-13 January 2005
Session 52 Stellar Atmospheres, Abundances and Opacities
Poster, Tuesday, January 11, 2005, 9:20am-6:30pm, Exhibit Hall

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[52.04] Germanium Abundances in Field Metal-Poor Turnoff Stars

R.C. Peterson (UCO/Lick, AAdv)

The germanium abundance of a half-dozen metal-poor turnoff stars of the field is determined from Ge I lines in the mid- and near-ultraviolet. The relative abundance of germanium with respect to iron varies considerably among the stars. The two with iron abundances near one-third solar show a nearly solar germanium-to-iron ratio, [Ge/Fe] ~ 0, but one appears more germanium-rich than the other. Another star with one-tenth the solar iron abundance also has [Ge/Fe] ~ 0, while the more metal-poor stars have [Ge/Fe] < 0 by large and variable factors. Although the sample is limited, we explore possible correlations of [Ge/Fe] with the relative abundances of other elements, including oxygen, aluminum, magnesium, and the r-process and s-process elements.

This work is supported in part by NASA/LTSA and Hubble Space Telescope awards.

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© 2004. The American Astronomical Society.