Velocity dispersion and mass of the globular cluster Omega Cen

Details Velocity dispersion and mass of the globular cluster Omega Cen Velocity dispersion and mass of the globular cluster Omega Cen

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pazh....2..146o&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal, vol. 2, Mar. 1976, p. 146-150. In Russian.

Astronomy and Astrophysics

Astronomy

Globular Clusters, Stellar Mass, Stellar Motions, Velocity Distribution, Astronomical Catalogs, Astronomical Models, Radial Velocity

Scientific paper

Data on the proper motions of stars in the globular cluster Omega Cen are used to determine the radial and transverse velocity dispersions as functions of distance from the cluster's center. The average velocity dispersion is found to be about 70 km/s, and the corresponding virial mass is estimated to be of the order of 10 million solar masses. The results yield preliminary indications that the 'hidden mass' of the cluster is distributed over its entire volume.

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