Emission spectra of weakly photoionized media in active nuclei of galaxies

Details Emission spectra of weakly photoionized media in active nuclei of galaxies Emission spectra of weakly photoionized media in active nuclei of galaxies

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213...29c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 29-48.

Astronomy and Astrophysics

Astrophysics

35

Active Galactic Nuclei, Emission Spectra, Photoionization, Astronomical Models, Balmer Series, Near Ultraviolet Radiation, Paschen Series, Recombination Reactions, X Ray Spectra

Scientific paper

Current photoionizatiom models have been extended toward low-ionization parameters, high densities, and high column densities in order to investigate the region emitting the low ionization lines in AGN. At low-incident flux, the emitted spectrum is found to be governed mainly by the sum, F(eff), of the near UV and X-ray continuum fluxes incident on the medium. All line fluxes are shown to saturate for F(eff) of about 10 to the 9th erg/sq cm, and the possibility of the existence of such high fluxes in the region emitting the low ionization lines is eliminated.

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