AAS 201st Meeting, January, 2003
Session 16. Stars in SDSS
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[16.12U] Photometric Separation of Physical Properties of Stars

M. K. Nordhaus, H. J. Newberg (Rensselaer Polytechnic Institute), J. Bagrow (Clarkson University), C. Rider (Boston University), D. Tucker (Fermi National Accelerator Laboratory), H. A. Rave (Drexel University), J. A. Smith (University of Wyoming)

Photometry collected using Sloan Digital Sky Survey filter systems is graphically compared to Kurucz model atmospheres with varying surface gravity, metallicity, and effective temperature over a color range which provides a useful separation in metallicity. With the use of SDSS data, it was determined that the metallicity of stars with 0.5 < g-r < 0.8 can be interpolated based upon their position in the stellar locus of a three dimensional color plot (Lenz et al. 1998). Application of this method to tens of millions of Galactic stars in the SDSS catalogs will shift the majority of stellar property determinations from spectral to photometric analysis, thus leveraging our ability to study Galactic structure and abundance gradients in the Galactic halo and thick disk.


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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.