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Session 3 - Clusters.
Display session, Monday, June 10
Tripp Commons,

[3.03] Photometry of Star Clusters Near the Galactic Center

J. Heasley (U. Hawaii), K. Janes (Boston U.), P. Demarque, R. Zinn (Yale U.)

Observations from the WFPC2 on the Hubble Space Telescope have been combined with ground-based CCD calibration frames to derive new color-magnitude diagrams for the globular clusters NGC 6624, NGC 6293, and NGC 6333. All three clusters lie in crowded fields in the direction of the galactic center. NGC 6624 is a metal-rich cluster ([Fe/H] = -0.4) thought to be part of the thick disk population, while NGC 6293 and 6333 are metal-poor clusters ([Fe/H] = -1.9 and -1.8 respectively) located within 3 kpc of the galactic center. The new color-magnitude diagrams are compared with theoretical isochrones and color-magnitude diagrams of clusters with similar metallicity located further from the galactic center.

Program listing for Monday