Statistical Kinematics of Nonrotating Globular Clusters

Details Statistical Kinematics of Nonrotating Globular Clusters Statistical Kinematics of Nonrotating Globular Clusters

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...490..263h&link_type=abstract

Astrophysical Journal v.490, p.263

Astronomy and Astrophysics

Astronomy

1

Celestial Mechanics, Stellar Dynamics, Galaxy: Globular Clusters: General, Methods: Statistical

Scientific paper

Nonparametric statistical models are presented to fully connect the observed kinematics to internal dynamics and gravitational potential of nonrotating globular clusters. The models assume only spherical symmetry and a smooth, static potential; the mass distribution plays the role of a free "parameter" and, in principle, is completely determined by the kinematics. The inclusion of proper-motion velocities in the data is shown to be required for a unique solution to the internal dynamics and mass distribution; observations of stellar densities and radial velocities alone are not sufficient to meaningfully constrain cluster dynamics and total mass.

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