The bumps in the spectral energy distribution of active galactic nuclei

Details The bumps in the spectral energy distribution of active galactic nuclei The bumps in the spectral energy distribution of active galactic nuclei

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373..405c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 405-413.

Astronomy and Astrophysics

Astrophysics

7

Active Galactic Nuclei, Astronomical Models, Photoionization, Spectral Energy Distribution, Accretion Disks, Spectral Bands, Spectral Emission, Ultraviolet Radiation, X Rays

Scientific paper

The spectral energy distribution of active galactic nuclei is investigated through calculations by composite models, which account for the coupled effect of the photoionizing flux from the active center and for shock propagation. The results show that bumps in the infrared, optical, and ultraviolet bands are produced by the emission of photoionized gas inside clouds of the narrow-line region; relatively strong radiation in the ultraviolet and X-ray domain is due to the high temperatures in the postshock region. Comparison with observational results show that a good fit can be obtained without assuming the contribution of an accretion disk, of starbursts, etc.

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