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Paper: A Gas Streamer Feeding the Circumnuclear Disk
Volume: 186, The Central Parsecs of the Galaxy
Page: 260
Authors: Coil, A. L.; Ho, P. T. P.
Abstract: We present VLA maps of NH3(1,1) and NH3(2,2) emission in the inner 10 pc of the Galaxy, covering Sgr A*, the circumnuclear disk (CND), and the 20 km sec-1 cloud. In the central 3 pc surrounding Sgr A* we map a portion of the CND which is connected to a long, narrow 2 pc by 10 pc streamer of clumpy molecular gas located towards the south. This southern streamer appears to be carrying gas from the nearby 20 km sec-1 cloud to the CND. We find a velocity gradient along the streamer, with progressively higher velocities as the gas approaches Sgr A*. The gas is the northern tip of the streamer is heated and the line width increases dramatically, which may be a kinematic signature of accretion onto the CND.
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