Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-24
Mon.Not.Roy.Astron.Soc.347:22,2004
Astronomy and Astrophysics
Astrophysics
18 pages, 26 figures, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07198.x
We study the regeneration of stellar bars triggered by a tidal interaction, using numerical simulations of either purely stellar or stellar+gas disc galaxies. We find that interactions which are sufficiently strong to regenerate the bar in the purely stellar models do not lead to a regeneration in the dissipative models, owing to the induced gas inflow in those models. In models in which the bar can be regenerated, we find a tight correlation between the strength and the pattern speed of the induced bar. This relation can be explained by a significant radial redistribution of angular momentum in the disc due to the interaction, similar to the processes and correlations found for isolated barred spirals. We furthermore show that the regenerated bars show the same dynamical properties as their isolated counterparts.
Athanassoula Evangelia
Berentzen Ingo
Fricke Klaus J.
Heller Clayton H.
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