Cool Stars 14 - Submitted Abstract # 409
This version created on 2 November 2006

Properties of Cool Stars in the HST Next-Generation Spectral Library



Sally Heap, NASA's GSFC
Don Lindler, Sigma/ACC

The Space Telescope Imaging Spectrograph (STIS) on Hubble has
collected  low-resolution ultraviolet and optical spectra of
~380 nearby stars (Michael  Gregg, PI). We have carried out a
custom reduction of these data to obtain a  complete spectrum of
each star stretching from 0.2-1.0 microns. For the ~ 250  stars
having high-quality spectra, we have measured ultraviolet and
optical  spectral indices. We derived the atmospheric properties
via Stromgren  photometry calibrated by the model atmospheres of
Castelli et al., and the  fundamental properties (mass, age, and
metallicity) via comparison with the  evolutionary models of
VandenBerg et al.(2006). Working with Gustavo Bruzual,  Stephane
Charlot, and Anna Gallazzi, we plan to use our results to
constrain  the star-formation history, mean age, metallicity,
and mass of galaxies over  the redshift interval, z=0-2. 


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