5 papers
Jet-cloud interations and the brightening of the narrow line region in Seyfert galaxies
W. Steffen, J. L. Gomez, A. C. Raga +1
We study the kinematical and brightness evolution of emission line clouds in the narrow line region (NLR) of Seyfert galaxies during the passage of a jet. We derive a critical dens…
Signatures of helical jets
W. Steffen
Observational signatures of helical jets can be found in some X-ray binaries (XRB), planetary nebulae, Herbig-Haro objects and in jets of active galactic nuclei (AGN). For the prot…
IRAS04210+0400: Modeling the optical spectra from flaring large scale jets
W. Steffen, A. J. Holloway, A. Pedlar
The emission-lines in the active galaxy IRAS\,0421+0400 show a dramatic (\,900\kms) increase in the velocity spread at the position of radio hot-spots which are located at th…
Jets and the emission-line spiral structure in IRAS 04210+0400
W. Steffen, A. J. Holloway, A. Pedlar
We examine models in which jets are responsible for the formation of the emission-line spiral structure in IRAS 04210+0400. The kiloparsec-scale radio lobes in this active galaxy a…
Kinematics of ionized gas associated with the radio nucleus and lobes in the active galaxy IRAS 04210+0400
A. J. Holloway, W. Steffen, A. Pedlar +4
We have used high resolution longslit spectroscopy to investigate the ionized gas in the active galaxy IRAS 04210+0400 and its association with the radio structure. We suggest that…