Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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METALLICITIES OF GLOBULAR CLUSTRES M3 AND M5 FROM VI CCD PHOTOMETRY

  • Published : 2000.06.01
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Abstract

To derive the metallicities of M3 and M5, we used the shape of red giant branch, horizontal branch magnitude, and red giant branch bump on the (V-I)-V color magnitude diagrams. [Fe/H] values ranging -1.46 ∼ -1.69 for M3, and -1.00 ∼ -1.49 for M5 are estimated. These values are in good agreements with the previously determined ones. This result leads the morphologies of red giant and horizontal branches on the (V-I)-V color magnitude diagrams can be good indirect metallicity indicators of galactic globular clusters.

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