Back to Volume
Paper: Parallax calibration of the population II main sequence
Volume: 4, The Extragalactic Distance Scale: Proceedings of the ASP 100th Anniversary Symposium
Page: 170
Authors: Lutz, Thomas E.; Hanson, Robert B.; van Altena, William F.
Abstract: The trigonometric parallax calibration of the field subdwarf main sequence is of vital importance for determining the distance moduli of globular clusters. A multivariate analysis has been performed to assess the dependence of Mv on (B-V) and (Fe/H), using 50 stars having both (1) very accurate trigonometric parallaxes and (2) spectroscopic (Fe/H) determinations. Possible effects on the calibration due to stellar surface gravity and age are discussed. The Lutz-Kelker Delta M corrections are very small for these stars.
Back to Volume