Biases in the Main Sequence Fitting Distances to Globular Clusters based on the Hipparcos Catalogue

1998/11/04 by Eugenio Carretta, E. Carretta, R. Gratton +9
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9811070

4 pages, LaTex, uses paspconf.sty. Poster paper to appear in the proceedings of "Harmonizing Cosmic Distance Scales in a Post-Hipparcos Era", eds. Daniel Egret and Andre Heck, in press

arxiv created 1998/11/04 · arxiv updated 2009/12/01

Abstract

We discuss the different biases affecting the sample of field subdwarfs selected from the Hipparcos Catalogue, and used in the Main Sequence Fitting technique to derive distances to Galactic Globular Clusters. The adopted average corrections significantly affect the derived distance moduli, explaining the differences among various groups using this technique.

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