Statistics – Computation
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1558c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, May 1990, p. 1558-1568.
Statistics
Computation
8
Computational Astrophysics, Stellar Motions, Stellar Physics, Stellar Systems, Kinematics, Solar Neighborhood, Velocity Distribution
Scientific paper
Some kinematic and dynamic implications of a superposition of two stellar systems are studied. In the general case of a stellar system in nonsteady states, Chandrasekhar's axially symmetrical model has been adopted for each one of the subsystems. The solution obtained for the potential function provides some kinematical constraints between the subsystems. These relationships are derived using the partial centered moments of the velocity distribution and the subcentroid velocities in order to study the velocity distribution. These relationships are used to prove that, only in a stellar system where the potential function is assumed to be stationary, the relative movement of the local subcentroids (not only in rotation), the vertex deviation phenomenon, and the whole set of the second-order-centered moments may be explained. A qualitative verification with three stellar samples in the solar neighborhood is carried out.
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