Composite models for the narrow emission-line region of active galactic nuclei. VI - The Fe lines

Details Composite models for the narrow emission-line region of active galactic nuclei. VI - The Fe lines Composite models for the narrow emission-line region of active galactic nuclei. VI - The Fe lines

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215..253v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 2, May 1989, p. 253-261.

Astronomy and Astrophysics

Astrophysics

44

Active Galactic Nuclei, Astronomical Models, Emission Spectra, Astronomical Spectroscopy, Iron, Particle Collisions, Photoionization, Spectral Line Width

Scientific paper

The observed Fe lines from AGN raise a series of problems not easily solved by photoionization models. In previous papers, it has been shown that composite models, which take into account the effect of shock hydrodynamics and photoionization, can successfully explain most of the observational features concerning the narrow emision line region of AGN. In this paper, the Fe lines are calculated by the composite models, and compared to observations. It is shown that the postshocked high temperature zone formed by compression is responsible for most of the forbidden Fe VII and forbidden Fe X line intensities. The theoretical values for forbidden Fe II 26-micron, forbidden Fe III 4658-A, forbidden Fe VII 6087-A and forbidden Fe X 6374-A relative to H-beta, are given for different sets of the input parameters. It is shown that the observed Fe lines are better explained by an ejection scenario.

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