AAS 201st Meeting, January, 2003
Session 115. Cool Star Atmospheres and Envelopes
Poster, Thursday, January 9, 2003, 9:20am-4:00pm, Exhibit Hall AB

[Previous] | [Session 115] | [Next]

[115.03] Chemical Abundances of Hipparcos Subgiants

H. Noriega-Mendoza, J.A. Holtzman (New Mexico State University), V.V. Smith (University of Texas at El Paso)

We obtained high resolution Echelle spectroscopy of a sample of Hipparcos subgiant stars (1.5 < M(Hp) < 4; 10pc < d < 80pc) to measure their detailed chemical abundances. The initial goal of this study is to measure metallicities of the subsample of Hipparcos stars where the location of the star in the color-magnitude diagram can uniquely give a stellar age if the metallicity is known, which is the case for subgiants. Our results represent the first stage of a project to combine the technique of modelling color-magnitude diagrams with that of modelling chemical evolution based on elemental abundances to provide a self-consistent picture of star formation in the solar neighborhood.

[Previous] | [Session 115] | [Next]

Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.