HST observations of NGC 6240

Details HST observations of NGC 6240 HST observations of NGC 6240

2001-06-20

arxiv.org/abs/astro-ph/0106368v1

Astronomy and Astrophysics

Astrophysics

To appear in: "The central kpc of starbursts and AGN: the La Palma connection", Eds. J.H. Knapen, J.E. Beckman, I. Shlosman an

Scientific paper

WFPC2 images and STIS spectroscopic observations are presented of the double nucleus in the merger system NGC 6240. We find that: (a) the kinematics of the ionized gas is similar to that of the molecular gas, despite a different morphology; (b) the gaseous and stellar kinematics are quite different, suggesting an early merger stage; (c) neither the gaseous nor the stellar kinematics show an obvious sign of the supermassive black hole believed to be responsible for the X-ray emission of NGC 6240; and (d) the steep off-nuclear velocity gradient is not due to a 10E11 solar mass black hole, in contrast to earlier suggestions.

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