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[52.02] The Luminosity Function and Color-Magnitude Diagram of the Globular Cluster M10

D.L. Pollard, E.L. Sandquist, J.R. Hargis (San Diego State U.), M. Bolte (U. California, Santa Cruz)

We present wide-field (24 arcmin x 24 arcmin) BVI photometry of the differentially-reddened globular cluster M10 (NGC 6254). The generated I band luminosity function and color-magnitude diagram are based on this sample of nearly 25,000 stars. Extensive artificial star tests have been performed in order to examine the incompleteness as a function of cluster magnitude and radius, and we have applied the extinction map of von Braun et al. (2002) to correct for cluster reddening effects. Because the luminosity function acts as a probe of the number of stars at different evolutionary states, the relative number of stars at each point can give clues to the physics involved in their evolution. In particular, we discuss the relative numbers of stars on the upper main sequence, subgiant, and giant branches.

This work has been funded through grant AST 00-98696 from the National Science Foundation.

The author(s) of this abstract have provided an email address for comments about the abstract: pollard@mintaka.sdsu.edu

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.