A Gas Streamer Feeding the Circumnuclear Disk

Details A Gas Streamer Feeding the Circumnuclear Disk A Gas Streamer Feeding the Circumnuclear Disk

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..186..260c&link_type=abstract

The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Edited by Heino Falcke, Angela Cotera, Wolfgang J. Duschl, F

Physics

Scientific paper

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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