The Dynamical Interaction of AGN with their Galaxian Environments

Abstract

Jet-driven shocks are responsible for an important fraction of the emission of the narrow-line regions (NLRs) in many classes of AGN. However, this cannot explain all observations. It is clear that the remaining sources are photoionised by the active nucleus. The 2-d hydrodynamic models from the RSAA group support an evolutionary scenario whereby the shock-excited NLRs are initially jet-driven but later, ionizing photons from the central engine replace shocks as the main excitation mechanism and shock induced star formation may also become important. In their photoionized phase, dusty and radiation-pressure dominated evolution produces a self-regulated NLR spectrum. This model aso explains the coronal emission lines and fast (3000 km s${}^{-1}$) outflows seen in some Seyferts.

4 pages, TeX (or Latex, etc), to appear in The Evolution of Galaxies III - From Simple Approaches to Self-Consistent Models, Eds. G. Hensler, G. Stasinska, S. Harfst, P.Kroupa & Chr. Theis, Astrophysics & Space Science, (in press)

References in corpus (4)

• Are the Narrow Line Regions in Active Galaxies Dusty and Radiation Pressure Dominated?
• Kinematic Linkage Between the Broad and Narrow Line Emitting Gas in AGN
• Spatial Resolution of High-Velocity Filaments in the Narrow-Line Region of NGC 1068: Associated Absorbers Caught in Emission?
• Near-Infrared Coronal Lines in Narrow-Line Seyfert 1 Galaxies