Change in angular velocity of perturbed galactic bars

Details Change in angular velocity of perturbed galactic bars Change in angular velocity of perturbed galactic bars

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280..105s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 1, p. 105-116

Astronomy and Astrophysics

Astrophysics

8

Angular Velocity, Astronomical Models, Barred Galaxies, Computerized Simulation, Cosmology, Mathematical Models, Perturbation, Angular Momentum, Galactic Evolution, Kinematics, Many Body Problem, Mass Transfer, Orbits

Scientific paper

The effect of tidal perturbations on the angular velocity of a barred galaxy is studied. Previous results indicating that the sign of this effect may depend on the perturber mass are confirmed. We study the changes in the parameters of the bar produced by the perturbation. Whereas the bar will always lose angular momentum in the interaction, it may either gain or lose mass depending on the position angle of the pericenter of the perturber. The induced mass exchange between the bar and the disc is significant only above a threshold in the perturbation strength. We propose that the total change in angular velocity results from a combination of the effects due to changes in mass and angular momentum.

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