NOAO > Observing Info > Approved Programs > 2010B-0075
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NOAO > Observing Info > Approved Programs > 2010B-0075 |
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PI: John R. Stauffer, California Institute of Technology, stauffer@ipac.caltech.edu
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.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2010B-0075 |
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