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Paper: High Velocity Ionized Component --- A Counter-Rotating Circumnuclear Disk in NGC 253
Volume: 240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA
Page: 404
Authors: Zhao, J.; Goss, W. M.; Ulvestad, J. S.; Anantharamaiah, K. R.
Abstract: We report on new VLA H53α line observations at 7 mm of the nuclear region of NGC 253 with an angular resolution of 1'' (15 pc at a distance of 3 Mpc) and a velocity resolution of 44 km s-1. An ionized component with a peculiar velocity VHel~ 400 km s-1 is detected at a position 0.3'' NE of the continuum peak. The kinematics in the nuclear region clearly show a counter-rotating circumnuclear disk, confirming the earlier H92α result of Anantharamaiah & Goss (1996).
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