Radial velocities and membership probabilities in the open star cluster NGC 6475 (M 7)

Details Radial velocities and membership probabilities in the open star cluster NGC 6475 (M 7) Radial velocities and membership probabilities in the open star cluster NGC 6475 (M 7)

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26as...61...75g&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 61, July 1985, p. 75-81.

Mathematics

Probability

14

Open Clusters, Radial Velocity, Star Distribution, Stellar Motions, Astronomical Catalogs, Probability Theory, Stellar Spectra

Scientific paper

For 76 stars in the field of the open cluster NGC 6475 calibrated objective prism radial velocities with a mean observational error near ±2 km s-1 are presented. HD 163302 has been detected to be a new spectroscopic binary. Preliminary orbital elements are given. Cluster and field stars are separated kinematically by their widely different velocity dispersions. A statistical interpretation of the velocity distribution reveals quantitative membership probabilities. A large fraction of cluster members are still identified beyond the conventional cluster radius. HD 162067 is discovered to be a high velocity star with a radial velocity of nearly 100 km s-1 of approach.

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