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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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