The Narrow Line Region: Current Models and Future Questions

Details The Narrow Line Region: Current Models and Future Questions The Narrow Line Region: Current Models and Future Questions

2006-12-12

arxiv.org/abs/astro-ph/0612309v1

Astronomy and Astrophysics

Astrophysics

10 pages, Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San

Scientific paper

I present a broad overview of modelling of the Narrow Line Region (NLR) of active galaxies, and discuss some of the more recent models we currently have for the emission from the NLR. I show why the emission line ratios from the NLR are constrained to certain observed values, and describe what physical parameters we can derive from observations using emission line models. Also presented are some examples of this, looking at the metallicity and excitation mechanism of active galaxies. As a final point, the limitations of the current models are discussed, and how how the combination of modelling and theory can help us solve some of the questions that still remain within the NLR.

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