Hi-Res Spectroscopy of a Volume-Limited Hipparcos Sample within 100   parsec: Austin Bash Symposium Conference Proceeding
  Accurate parallaxes from the Hipparcos catalog have enabled detailed studies of stellar properties. Subgiants are of particular interest because they lie in an area where isochrones are well separated, enabling dependable age determination. We have initiated a project to obtain hi-res spectra of Hipparcos subgiants in a volume-limited sample within 100 pc. We obtain stellar properties and abundances via fully automatic analysis. We will use our results to constrain star formation history and chemical evolution in the solar neighborhood. We present initial results for our observed sample and discuss future development for this project. 
P. L. Lim, J. A. Holtzman, V. V. Smith, and K. Cunha