The local kinematics of open star clusters

Details The local kinematics of open star clusters The local kinematics of open star clusters

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188...35l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. 35-38.

Astronomy and Astrophysics

Astrophysics

14

Open Clusters, Radial Velocity, Statistical Analysis, Stellar Motions, Astronomical Catalogs, Astronomical Coordinates, Milky Way Galaxy, Solar Neighborhood, Velocity Distribution

Scientific paper

Data on positions, distances, and radial velocities of 106 open star clusters available from the computer-based catalogue of open clusters prepared by Lyngå have been used in a statistical analysis of the local kinematics. The authors find a velocity field that deviates significantly from circular streaming. The dispersion of the radial velocity residuals increases with age: for the old clusters it is about twice that for young clusters. This may be a further evidence of heating of the galactic disk. The relatively low velocity residuals of the very oldest clusters are explained as a bias due to the disruption of open clusters.

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