Metallicity of Globular Cluster M13 from VI CCD Photometry

Details Metallicity of Globular Cluster M13 from VI CCD Photometry Metallicity of Globular Cluster M13 from VI CCD Photometry

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jass...17..140s&link_type=abstract

Journal of Astronomy and Space Sciences, vol. 17, no. 2, p. 133-140

Astronomy and Astrophysics

Astronomy

Spectroscopy, Absorption-Line, Galactic Bulge

Scientific paper

From the VI images of M13, obtained by using 2K CCD camera and the BOAO 1.8m telescope, we derive the (V-I)-V CMD of M13. From the shapes of red giant branch, the magnitude of horizontal branch, and the giant branch bump on the constructed CMD, we determined the metallicity of the globular cluster to be 1.74 ~<[Fe/H]~< -1.41. The good agreement between our determination of [Fe/H] and those determined by using other methods implies that the morphology of red giant and horizontal branches on (V-I)-V CMD's can be good indirect metallicity indicators of Galactic globular clusters.

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