Ultraviolet and X-ray observations of active galactic nuclei: Constraints on models of the broad emission line region

Details Ultraviolet and X-ray observations of active galactic nuclei: Constraints on models of the broad emission line region Ultraviolet and X-ray observations of active galactic nuclei: Constraints on models of the broad emission line region

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984cfua.rept....1m&link_type=abstract

In its LHEA Contrib. to the Future Ultraviolet Astron. Based on Six Years of IUE Res. p 1-9 (SEE N84-25559 15-89)

Physics

Atomic Physics

Active Galactic Nuclei, Astronomical Models, Broadband, Emission Spectra, Photoionization, Quasars, Seyfert Galaxies, Ultraviolet Spectra, X Ray Spectroscopy, Atomic Physics, Continuous Spectra, Cosmic Dust, Heao 1, Heao 2, Hydrogen Clouds, Iue, Line Of Sight, Line Spectra, Luminosity, Lyman Alpha Radiation, Metals, Red Shift, Spectral Line Width, X Ray Absorption, X Ray Spectra

Scientific paper

Many active galactic nuclei, in particular quasars and Seyfert I's, are characterized by strong, broad emission lines from permitted transitions in abundant elements. In the simplest models, these lines ofriginate in clouds located at some characteristic distance from the central ionizing source in a quasi-spherical distribution. Ultraviolet and X-ray spectroscopic data gathered from the International Ultraviolet Explorer (IUE), HEAO 1, and HEAO 2 are utilized herein to further define and refine the photoionization models of the broad emission line region (BLR) of these galactic nuclei. Parameters including X-ray spectra, X-ray absorption, ultraviolet spectra, hydrogen cloud geometry, cosmic dust, cloud metallicity, and continuous spectra are considered. The luminosity of galactic nuclei is also discussed.

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