The effect of a central supermassive black hole on gas
fuelling |
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Authors: | HiroyukiFukuda KeiichiWada AsaoHabe |
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Institution: | Division of Physics, Graduate School of Science, Hokkaido University, Kita 10 Nishi 8, Sapporo 060, Japan; National Astronomical Observatory, Mitaka, Tokyo 181, Japan |
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Abstract: | When a supermassive black hole exists in the centre of a galaxy, an additional inner Lindblad resonance (ILR) exists inside the usual ILRs. We study gas dynamics in a weakly barred potential with a central supermassive black hole by using 2D numerical simulations, and we investigate the effect of the additional ILR on the fuelling of gas into nuclear starburst regions or active galactic nuclei (AGNs). Our numerical results show that strong trailing spiral shocks are formed at the resonance region, and that the gas in the shock region is rapidly fuelled into a central region and makes a nuclear gas ring. As a result, a large amount of gas is concentrated in the nuclear region beyond the ILR in a dynamical time-scale. |
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Keywords: | methods: numerical ISM: kinematics and dynamics galaxies: nuclei galaxies: starburst |
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