New subdwarfs. VI. Kinematics of 1125 high-proper-motion stars and the collapse of the Galaxy

The UVW velocity components, planar eccentricities, and angular momenta of 878 high-proper-motion stars are determined using the radial-velocity data of Fouts and Sandage (1986) and compared with chemical abundances and photometric parallaxes from the UBV photometry of Sandage and Kowal (1986). The results are presented, along with published data on 247 additional stars, in extensive tables and graphs and characterized in detail. Two approximately equal components are differentiated: a low-velocity component identified as part of the thick disk described by Gilmore and Reid (1983) and a high-velocity halo component. The data are found to support a model of Galactic collapse (with concomitant spinup and progressive chemical enrichment) which includes a rotating bulge (the thick disk) with kinematic and metallicity properties between those of the old thin disk and the halo. 88 references