Probing the Metal-Rich Stellar Population in the Solar Neighborhood

Details Probing the Metal-Rich Stellar Population in the Solar Neighborhood Probing the Metal-Rich Stellar Population in the Solar Neighborhood

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110407t&link_type=abstract

American Astronomical Society, AAS Meeting #211, #104.07; Bulletin of the American Astronomical Society, Vol. 39, p.925

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Spectroscopic analyses of field stars in the neighborhood of the sun have revealed an increasing sample of stars with metallicity above that of the Hyades, the defining standard for classification as metal-rich. The significance of such stars lies both with their role in detailing galactic chemical evolution and in supplying candidates for planetary searches. A recent recalibration of the extended Stromgren photometric system has demonstrated that, when combined with Hβ photometry, it has the ability to supply reliable metallicity determinations for G and K dwarfs. To expand and enhance this application, a pilot program has been initiated obtaining uvbyCaHβ photometry of over 100 stars selected from the Hipparcos catalog based upon their position above the Hyades main sequence, a product of either binarity or high metallicity. Preliminary results of this program will be presented demonstrating that a large fraction of the stars are, in fact, more metal-rich than the Hyades.
This research was made possible by the National Science Foundation through grant AST 04-53609 for support of the CSUURE Research Experiences for Undergraduates (REU) program at Mount Laguna Observatory in San Diego.

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