Stellar kinematics in the galactic centre

Details Stellar kinematics in the galactic centre Stellar kinematics in the galactic centre

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..421m&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 421-424 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

Galactic Nuclei, Infrared Spectroscopy, Late Stars, Stellar Motions, Carbon Monoxide, Galactic Evolution, Galactic Mass, Mass Distribution, Stellar Evolution

Scientific paper

The observations of the stellar kinematics in the central 8 pc of the Galaxy are presented. It is shown that the spectroscopy of the 2.3 microns CO absorption feature, in late type stars, yields the stellar velocity dispersion and the average stellar radial velocity as a function of galactocentric distance. A sample spectra that illustrates the observed velocity shifts and velocity dispersion is given. The analysis shows that the velocity dispersion of the stars is large, and that it dominates the stellar kinematics. The use of these kinematic data, to probe the mass distribution in the Galactic center, is considered.

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