PI: John R. Stauffer, California Institute of Technology, email@example.com
Address: Spitzer Science Center, Mail Code 100-22, Pasadena, CA 91125, USA
CoI: Deokkeun An, Ewha W. University, Seoul, Korea
Title: Pleiades-like Stars in the \it Hipparcos Catalog
Abstract: The tension between the \it Hipparcos parallax of the Pleiades and other independent distance estimates continues even after the new reduction of the \it Hipparcos astrometric data. A short Pleiades distance from the \it Hipparcos parallax predicts that a number of young field stars in the solar neighborhood should be sub-luminous at a given photospheric abundance (i.e. they should have the "Pleiades disease"). We propose to obtain spectroscopic abundances for a subset of stars in the \it Hipparcos catalog, which occupy the same region as the Pleiades in the color-magnitude diagram, and to directly test this hypothesis. Failure to find any such sub-luminous, young solar metallicity stars would strongly contradict the \it Hipparcos Pleiades distance. This is a continuation of a program approved for 2010A (observations scheduled for May 2010), to cover the other half of the northern sky.
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