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| Paper: |
The High-Density Ionized Gas in the Central Parsecs of the Galaxy |
| Volume: |
439, The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies |
| Page: |
27 |
| Authors: |
Zhao, J.; Blundell, R.; Moran, J. M.; Downes, D.; Schuster, K. F.; Marrone, D. |
| Abstract: |
We report the results from observations of H30α line emission
in Sgr A West with the Submillimeter Array at a resolution of 2″
and a field of view of about 40″. The H30α line is sensitive
to the high-density ionized gas in the minispiral structure. We compare
the velocity field obtained from H30α line emission to a Keplerian
model, and our results suggest that the supermassive black hole at Sgr A*
dominates the dynamics of the ionized gas. However, we also detect
significant deviations from Keplerian motion, which show that the
impact of strong stellar winds from the massive stars along the ionized
flows and the interaction between Northern and Eastern arms play
significant roles in the local gas dynamics. |
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