Numerical Experiments on the Formation of Tails and Bridges in Galaxies
Interacting galaxies show peculiar features like tails, bridges and counterarms of various sizes and shapes. Numerical experiments have been performed, using restricted-three-body approximation,to investigate as to how the formation of tails and bridges depends on the mass ratio µ = M1/M0, where M1 is the mass of the perturber and M0 is the mass of the test galaxy. Results indicate that (i) tails and bridges occur when µ is of the order of unity, (ii) increasing perturber mass leads to greater disruption of test galaxy; and (iii) there is a sharp decrease in the density of the test galaxy at the tidal radius after the encounter has taken place.
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