Effect of hard X-rays on the emission lines of Seyfert galaxies and QSOs

Details Effect of hard X-rays on the emission lines of Seyfert galaxies and QSOs Effect of hard X-rays on the emission lines of Seyfert galaxies and QSOs

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....79...56s&link_type=abstract

Astronomy and Astrophysics, vol. 79, no. 1-2, Oct. 1979, p. 56-59.

Astronomy and Astrophysics

Astronomy

4

Emission Spectra, Quasars, Seyfert Galaxies, X Ray Astronomy, Abundance, Line Spectra, Oxygen Spectra, Photoionization, Spectral Line Width

Scientific paper

Models of photoionized emission-line regions show that inclusion of a hard X-ray component in the ionizing continuum has relatively minor effects on most optical line intensities but helps to explain the strong O VI emission observed from QSOs. The optical-forbidden lines of NGC 4151 indicate roughly solar abundances ratios of N/O/Ne/Fe. The X-ray absorption arises largely in neutral portions of the emission-line clouds.

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