Pleiades-like Stars in the Hipparcos Catalog

Details Pleiades-like Stars in the Hipparcos Catalog Pleiades-like Stars in the Hipparcos Catalog

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop...75s&link_type=abstract

NOAO Proposal ID #2010B-0075

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Scientific paper

The tension between the Hipparcos parallax of the Pleiades and other independent distance estimates continues even after the new reduction of the Hipparcos astrometric data. A short Pleiades distance from the 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 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 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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