Photometry of Star Clusters Near the Galactic Center

Details Photometry of Star Clusters Near the Galactic Center Photometry of Star Clusters Near the Galactic Center

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.0303h&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #03.03; Bulletin of the American Astronomical Society, Vol. 28, p.821

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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