Metallicity Distribution of the Galactic Halo from SDSS Photometry

Details Metallicity Distribution of the Galactic Halo from SDSS Photometry Metallicity Distribution of the Galactic Halo from SDSS Photometry

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943920a&link_type=abstract

American Astronomical Society, AAS Meeting #219, #439.20

Statistics

Methodology

Scientific paper

We describe the methodology required for the estimation of photometric metallicity from the SDSS ugriz passbands and present a preliminary metallicity distribution of the Galactic halo system. Stellar isochrones have been empirically calibrated against observations of several star clusters over a wide range of metal abundance, and the accuracy of photometric Teff and [Fe/H] from these models has been confirmed using the Infrared Flux Method (IRFM) Teff scale and [Fe/H] values from the SDSS spectroscopic pipeline (SSPP). Based on these models, we estimate distances and metallicities for individual main-sequence stars in the SDSS Stripe 82 region, and present a preliminary in situ metallicity distribution of the halo system. Comparisons with numerical models and correlations between kinematic and metallicity distributions are discussed.

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