An archival study of IUE observations of low redshift quasars

Details An archival study of IUE observations of low redshift quasars An archival study of IUE observations of low redshift quasars

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..649c&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 649-65

Astronomy and Astrophysics

Astrophysics

Iue, Quasars, Ultraviolet Spectra, Continuums, Emission Spectra, Far Ultraviolet Radiation, Galactic Nuclei, Seyfert Galaxies

Scientific paper

The emission line and continuum characteristics of a sample of 18 low redshift QSOs from the IUE Archives are presented. The spectral index is found to have a mean value of 1.22, which is considerably steeper than the index of the same spectral region for high redshift QSOs. The line ratios L alpha/H beta and C IV/L alpha for the sample, 9.4 + or - 1.9 and 0.61 + or - .06, respectively, are consistent with the values of the photoionization models. When the low redshift sample is extended with Seyfert galaxies, intermediate redshift QSOs and high redshift QSOs, the equivalent width of L alpha and CIV anticorrelates with the luminosity at 1450 A. The slope of the anticorrelation is seen to be steeper for the higher redshift samples than for the lower redshift samples.

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