Stellar kinematics in the Galactic center

Details Stellar kinematics in the Galactic center Stellar kinematics in the Galactic center

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..824m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 824-840. Research supported by East-West Center.

Astronomy and Astrophysics

Astrophysics

108

Galactic Nuclei, Milky Way Galaxy, Star Clusters, Stellar Motions, Brightness Distribution, Density Distribution, Error Analysis, Fabry-Perot Spectrometers, Faint Objects, Galactic Rotation, Mass Distribution

Scientific paper

The results of a project to map extensively the stellar kinematics on the central 10 pc of the Galaxy are presented. The spatial dependence of the integrated stellar velocity and velocity dispersion are determined. The stars in the region move with a combination of ordered rotation and chaotic motion. The random component of the motion generally dominates the systemic component, particular at small radii. The stars and the gas are found to have different kinematics. Analysis of the stellar kinematics confirms that the dynamical center of the Galaxy is coincident with IRS 16 within + or - 10 deg. The observations and the theory of stellar hydrodynamics are used to obtain an estimate of the mass distribution between a Galactocentric radius of 0.5 and 5 pc.

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