Other
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382l..11s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 382, Nov. 20, 1991, p. L11-L14.
Other
19
Accretion Disks, Celestial Mechanics, Elliptical Galaxies, Galactic Nuclei, Galactic Rotation, Galactic Structure, Kinematics, Stellar Motions
Scientific paper
NGC 5982 is an elliptical galaxy with a 'kinematically distinct core' whose projected rotation axis is about 90 deg away from that of the galaxy's outer parts. Distinct cores in other ellipticals have been attributed to dynamically distinct subsystems that are the remnants of accreted companions. Here, a model for NGC 5982 is presented in which the kinematic twist in the core results simply from the projection of the major families of circulating orbits in a triaxial potential. Orbits in the model are populated smoothly, and the core is not a dynamical subsystem. The model predicts a complicated overall velocity field for the galaxy, with particularly low velocity amplitudes (15 km/s or less) along a direction 150 deg counterclockwise from the major axis, a direction not yet observed spectroscopically.
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