O-star kinematics

Details O-star kinematics O-star kinematics

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61...66k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 61, Jan.-Feb. 1984, p. 66-74) Soviet Astronomy (ISSN 0038-5301), vol. 28, Jan.-Feb. 1984, p. 40-

Astronomy and Astrophysics

Astronomy

Astrometry, O Stars, Stellar Motions, Distance, Oort Cloud, Orbital Elements, Random Errors, Velocity Distribution

Scientific paper

Proper motions determined by the authors are utilized to study the kinematics of 79 O-type stars at distance less than 2.5 kpc. The sample is divided into two groups, having space-velocity dispersions of roughly 10 km/sec and 35 km/sec. Solutions for the velocity-field parameters for group I yield a galactic angular rotation speed of 24.9 km/sec/kpc at the sun and an Oort constant of 12.2 km/sec/kpc. Most of the O stars exhibit a small z-velocity directed away from the galactic plane. The velocity-ellipsoid parameters and box-orbit elements are calculated.

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