Gas inflow in barred galaxies — effects of secondary bars

• DOI: 10.1046/j.1365-8711.2002.04957.x
• Publication Date: 2003-03-12T14:01:11Z
• Authors: Witold Maciejewski; Peter J. Teuben; Linda S. Sparke; James M. Stone
• Keywords: Barred spiral galaxy; Bar (unit); Inflow; Dust lane

We report here results of high-resolution hydrodynamical simulations gas flows in barred galaxies, with a focus on dynamics the central kiloparsec. In single bar an Inner Lindblad Resonance, we find either near-circular motion nuclear ring, or spiral shock extending towards galaxy center, depending sound speed gas. From simple model dynamically-possible doubly resonant coupling, infer that secondary is likely to end well inside its corotation. Such cannot create shocks flow, and therefore will not reveal itself color maps through straight dust lanes: induced by it are different from those caused rapidly rotating main bars. particular, stellar bars unlikely increase mass inflow rate into galactic nucleus.