Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-04-08
Astronomy and Astrophysics
Astrophysics
Contributed Paper for IAU 222: The Interplay among Black Holes, Stars and ISM in Galactic Nuclei
Scientific paper
10.1017/S1743921304002224
Seyfert narrow line regions (NLR) have emission line ratios which are remarkably uniform, displaying only ~0.5 dex variation between different galaxies. Existing models have been unable to explain these observations without the introduction of ad hoc assumptions, geometrical restrictions or new parameters. Here we introduce a new model: dusty radiation pressure dominated photoionization, which provides a natural self-regulating characteristic leading to an invariance of the spectrum over a very wide range (>100) of ionization parameter. The dusty model is able to reproduce both the range and the absolute value of the observational line ratios not only in the standard optical diagnostic diagrams but also in UV diagnostic plots, providing an explanation to the problem in NLR observations.
Dopita Michael
Groves Brent
Sutherland Ralph
No associations
LandOfFree
Dusty, Radiation Pressure Dominated Photoionization: The Solution to the Narrow Line Region Problem 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 Dusty, Radiation Pressure Dominated Photoionization: The Solution to the Narrow Line Region Problem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dusty, Radiation Pressure Dominated Photoionization: The Solution to the Narrow Line Region Problem will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-158233