Kinematic Constraints on UV and X-ray Absorbers in Seyfert 1 Galaxies

Details Kinematic Constraints on UV and X-ray Absorbers in Seyfert 1 Galaxies Kinematic Constraints on UV and X-ray Absorbers in Seyfert 1 Galaxies

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..311..235c&link_type=abstract

AGN Physics with the Sloan Digital Sky Survey, Proceedings of a conference held in Princeton, NJ, USA, 27-31 July 2003, Edited b

Physics

3

Scientific paper

We have discovered a decreasing radial velocity in an outflowing UV absorber in NGC 3783; this is the first detection of a changing radial velocity in a Seyfert absorber. The velocity decrease could be due to bulk deceleration of the gas or to a change in the direction of motion of the outflow across the line of sight to the broad-line region (BLR). The available evidence favors the latter possibility, which is exciting because it is predicted by dynamical models of accretion disk winds. This simple model of a changing velocity vector predicts that the absorption column should decrease, and possibly even disappear, by early 2005.

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