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High velocity ionized component - A counter-rotating circumnuclear disk in NGC 253

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2001

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Astronomical Society of the Pacific

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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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Restricted Access. Gas and Galaxy Evolution, ASP Conference Proceedings, Vol. 240. Eds. John E. Hibbard, Michael Rupen, and Jacqueline H. van Gorkom. San Francisco: Astronomical Society of the Pacific, 2001,

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ASP Conference Series, 2001, Vol.240, p404

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http://hdl.handle.net/2289/2530

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2001 Astronomical Society of the Pacific