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| Paper: |
Rings and Star Formation in Central Regions of Simulated Barred-spiral Galaxies |
| Volume: |
528, New Horizons in Galactic Center Astronomy and Beyond |
| Page: |
335 |
| Authors: |
Seo, W.-Y.; Kim, W.-T.. |
| Abstract: |
To study formation and evolution of gaseous structures and star formation in central region of barred-spiral galaxies in realistic environments, we run fully self-consistent three-dimensional simulations of Milky Way-sized, isolated galaxies. We find that a bar forms rapidly and drives gas inflows to form a dense star-forming nuclear ring in the central regions. The ring is tens of parsecs in size in the beginning and grows to a few hundred parsecs at late time. The increase in the ring size is caused by addition of gas with larger angular momentum initially located at larger galactocentric radii. Physical properties of the nuclear rings formed in our numerical models are similar to those of the Central Molecular Zone in the Milky Way. The ring star formation rate is well correlated with the mass inflow rate to the ring. The ring star formation rate is overall larger for a galaxy with a stronger bar, and is episodic and bursty due to star formation feedback. |
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