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Paper: Metallicity Distribution of the Galactic Halo from SDSS Photometry
Volume: 458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way
Page: 179
Authors: An, D.; Beers, T. C.; Johnson, J. A.; Pinsonneault, M. H.; Lee, Y. S.; Ivezić, Z.; Newby, M.
Abstract: 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) temperature scale and [Fe/H] values from SDSS/SEGUE. 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. Correlations between kinematic and metallicity distributions are discussed.
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