Velocity dispersion and mass of the globular Omega Centauri

Details Velocity dispersion and mass of the globular Omega Centauri Velocity dispersion and mass of the globular Omega Centauri

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sval....2...57o&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 2, Mar. 1976, p. 146-150.) Soviet Astronomy Letters, vol. 2, Mar.-Apr. 1976, p. 57-59.

Astronomy and Astrophysics

Astronomy

1

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

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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