Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-04-12
Astrophys.Space Sci. 276 (2001) 699-706
Astronomy and Astrophysics
Astrophysics
9 pages with 5 figures. To appear in "The Evolution of Galaxies on Cosmological Timescales" ed. J.E. Beckman & T.J. Mahoney, A
Scientific paper
10.1023/A:1017557815253
Using an N-body+SPH code we have performed numerical simulations to investigate the dynamical effects of an interaction between an initially barred galaxy and a small spherical companion. In the models described here the small companion passes through the disk of the larger galaxy perpendicular to its plane. The impact positions and times are varied with respect to the evolutionary phase of the bar and disc. The interactions produce expanding ring structures, offset bars, spokes, and other asymmetries in the stars and gas. They also affect the strength and pattern speed of the bar.
Athanassoula Evangelia
Berentzen Ingo
Fricke Klaus J.
Heller Clayton H.
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