Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..13..163c&link_type=abstract
Emission Lines from Jet Flows, Isla Mujeres, Q.R., México, November 13-17, 2000 (Eds. W. J. Henney, W. Steffen, A. C. Raga, and
Astronomy and Astrophysics
Astronomy
1
Galaxies: Ism, Galaxies: Jets, Galaxies: Seyfert
Scientific paper
HST observations provided us with the spatial resolution required to explore in detail the properties of the Narrow Line Region of Seyfert galaxies. In Seyferts with extended radio structures the HST images revealed a very close connection between radio and optical line emission. We interpret this result as strong evidence that the line-emitting gas is compressed by the shocks created by the passage of the radio-emitting outflow. The increase in the density due to the shocks causes the line emission to be highly enhanced in the region where this interaction occurs. Spectroscopy of the NLR confirms the presence of a strong interaction: in the region co-spatial with the radio-jets, the gas velocity field is highly perturbed and shows two velocity systems separated by as much as 1700km s-1. In several locations the split lines form an almost complete velocity ellipsoid, implying that we are seeing an expanding shell of gas. We conclude that the morphology and the kinematics of the NLR in these sources are dominated by the presence of radio outflows, which might also have a significant role in the ionization balance. Observations of Seyfert galaxies represent a unique tool to study energetics and evolution of ISM/jets systems.
No associations
LandOfFree
The HST View of the Narrow Line Region of Seyfert Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The HST View of the Narrow Line Region of Seyfert Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The HST View of the Narrow Line Region of Seyfert Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200421