RMxAA

Revista Mexicana de Astronomía y Astrofísica

ISSN: 3061-8649
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Uvby-B Photometry of High Velocity Stars. Photometric Parallaxes and Preliminary Kinematic Results. (1990). Revista Mexicana De Astronomía Y Astrofísica, 21(1), 300. https://astronomia.unam.mx/journals/rmxaa/article/view/1990rmxaa..21..300s

Abstract

Two methods for the determination of parallaxes using uvbyP photometry are being explored. These methods depend upon the standard relations of Crawford (1975) and of Olsen (1984) and upon synthetic colors and magnitudes of VandenBerg and Bell (1985). Both include an evolutionary correction of the form f6c0. Distances are calculated for the 711 high-velocity and metal-poor stars in the uvby-P catalogue of Schuster and Nissen (1988). These are compared to the distances of Sandage and Fouts (1987) and Laird, Carney, and Lathain (1988) for stars in common. Also our methods are applied to parallax stars. In general the comparisons are good with negligible or small systematic differences. The final distances of our 711 stars are applied to a number of kinematical problems. Several interesting diagrams are studied, sucl as Toomre energy diagram and the plot of V(rot) versus [Fe/H]. Key words: DISTANCES - PHOTOMETRY - STARS-POPULATION II
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