Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc...42f&link_type=abstract
Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam
Other
Scientific paper
When a supermassive black hole exists in the center of a galaxy, an additional ILR exists inside of usual ILRs. We study gas dynamics in a weakly barred potential with a central SMBH by using 2D numerical simulations, and we investigate the effect of the additional ILR on the fueling of gas into nuclear starburst regions. Our numerical results show that strong trailing spiral shocks are formed in the resonance region, and that the gas in the shock region falls rapidly into a central region and makes a nuclear gas ring (~100 pc). As a result, a large amount of gas is concentrated in the nuclear region beyond the ILR in a dynamical time-scale. Next, we investigate the fate of the gas ring involving self-gravity of gas. We find that the gas ring becomes gravitationally unstable for surface density of gas above a critical value, and fragments into several gas clumps. Some clumps increase their mass via accretion of surrounding gas and collisions with other clumps, and finally a very massive gas clump is formed. If massive star formation takes place in the massive gas clump, it may correspond to a super star cluster observed in some starburst galaxies.
Fukuda Hiroshi
Habe Asao
Wada Keiichi
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