Reinvestigation of O, B star kinematics and determination of corrections to precession

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B Stars, Correction, Kinematic Equations, O Stars, Precession, Stellar Motions, Astrometry, Early Stars, Error Analysis, Milky Way Galaxy, Oort Cloud, Position Errors, Radial Velocity, Velocity Errors

Scientific paper

The published radial velocities, distances, and proper motions of 1412 early-type stars are used to analyze the kinematics of the Galaxy in the solar vicinity (up to 2 kpc). The data selection and analysis methods are explained, and the results are presented in tables and graphs. Stars of different heliocentric-distance groups are shown to have different mean motions relative to the sun, a phenomenon explained by the three-star-drift hypothesis, with an outward velocity of 25 km/s for the local standard of rest. Other parameters determined include the Oort and Galactic-radial-motion parameters and the precession corrections: A = 16.6 + or - 0.6 km/s kpc, B = 14.4 + or - 1.7 km/s kpc, C = 0.5 + or - 0.5 km/s kpc, D = -2.0 + or - 0.4 km/s kpc, Delta n = 560 + or 40 marsec/100 yr, and Delta k = -330 + or - 50 marcsec/100 yr.

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