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Distances of Globular Clusters based on Hipparcos Parallaxes of Nearby Subdwarfs

Lee, Sang-Gak; Saad, Somaya Mohamed

In the present study we have determined the distance moduli for seven globular clusters M2, M3, M10, M12, NGC 2808, NGC 6229 and NGC 6752, whose metallicities are in the range -1.54 < [Fe/H] < -1.10. We have derived distances for them by the main-sequence fitting method using a sample of local subdwarfs, whose accurate parallaxes are taken f…