Abstract
view Abstract Citations (12) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Narrow Emission-Line Profiles of Active Galactic Nuclei Contini, M. ; Viegas-Aldrovandi, S. M. Abstract Theoretical emission-line profiles are presented for the narrow emission-line region of active galactic nuclei, for lines in a broad wavelength range (1000-10000 A). The profiles are calculated using emission-line intensities given by composite models described in our previous papers. For the calculations we assume that (a) the clouds are moving radially from the galactic center, (b) photoionization and shock effects are taken into account, coupled in a self-consistent way, and (c) the velocity distribution of the emitting clouds is an exponential or a power-law function. In this paper several models are considered, depending on the intensity of the ionizing radiation in the velocity field. The results are shown as synthetic spectra for ease in comparison with observations. Then single indicative line profiles are presented and are compared to observed ones. The results show that our theoretical calculations, based on composite models, can explain many observed features, in particular, line widths and line asymmetries, with simple physical assumptions. Publication: The Astrophysical Journal Pub Date: August 1989 DOI: 10.1086/167686 Bibcode: 1989ApJ...343...78C Keywords: Active Galactic Nuclei; Emission Spectra; Line Spectra; Spectrum Analysis; Astronomical Models; Forbidden Transitions; H Beta Line; Seyfert Galaxies; Astrophysics; GALAXIES: NUCLEI; GALAXIES: SEYFERT; LINE PROFILES; SHOCK WAVES full text sources ADS |
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