Prominent ultraviolet emission lines from Type 1 Seyfert galaxies

Details Prominent ultraviolet emission lines from Type 1 Seyfert galaxies Prominent ultraviolet emission lines from Type 1 Seyfert galaxies

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266...28w&link_type=abstract

Astrophysical Journal, Part 1, vol. 266, Mar. 1, 1983, p. 28-40.

Astronomy and Astrophysics

Astronomy

150

Emission Spectra, Line Spectra, Quasars, Seyfert Galaxies, Ultraviolet Spectra, Active Galactic Nuclei, Astronomical Models, Data Correlation, Iue, Luminosity, Photoionization, Spaceborne Astronomy

Scientific paper

IUE Explorer data with a 6-A resolution are reported for Ly-alpha, C IV 1550 A, C III semiforbidden line 1909 A, and Mg II 2800 A, as well as the continuum at 1450 A, for 20 Seyfert galaxies and one quasar. Good correlation is found between the continuum and the line fluxes, indicating that photoionization is the dominant heating mechanism for these active galactic nuclei. A combination of the data for Seyferts and high redshift quasars covering five orders of magnitude in continuum luminosity shows the lower luminosity objects to have higher equivalent widths for their emission lines, suggesting that the covering factor increases with decreasing luminosity.

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