Friday, 28 February, 1997 at 3:30pm in the JAC Library

Heino Falke - U Maryland

"High-Resolution HST and VLA observations of Seyfert galaxies"

ABSTRACT: "We have observed a sample of 8 Seyfert galaxies with the HST in OIII and Halpha filters. Excitation maps reveal the signatures of ionization cones in many cases. 3.6cm and 2cm VLA radio maps show that in most of these galaxies a radio jet plays a crucial role in shaping the morphology of the NLR - in some case producing distinct features like bow shocks and narrow emission line strands. One galaxy, ESO428-G14 even exhibits an emission-line jet with a helical pattern. The observations confirm the notion that jets are the rule rather than the exception and are integral parts of most AGNs."