Abstract
view Abstract Citations (77) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Optical and X-ray properties of X-ray selected active galactic nuclei. Kriss, G. A. ; Canizares, C. R. Abstract X-ray data and optical spectrophotometric data are presented for 25 newly identified X-ray selected active nuclei (AGN). This sample is combined with another, more comprehensive sample, and correlations are studied between the X-ray continuum, the optical continuum, and various optical emission lines. The implications for the physical processes at work in AGN are discussed, as is the X-ray luminosity function of X-ray selected AGN and their surface density on the sky. In many respects, the X-ray AGN are indistinguishable from Seyfert 1 galaxies and low-redshift, optically selected QSOs. The optical spectra generally show broad permitted lines and narrow forbidden lines. The effective power law index from 4000 A to 2 keV has the same distribution as that observed for Seyfert 1 galaxies. The results imply that the shape of the underlying continuum from the optical through the X-ray and the physical conditions in the broad line emitting region are basically similar for all the AGN over a range of four orders in absolute luminosity. Publication: The Astrophysical Journal Pub Date: October 1982 DOI: 10.1086/160317 Bibcode: 1982ApJ...261...51K Keywords: Active Galactic Nuclei; Visible Spectrum; X Ray Sources; Red Shift; Spectral Line Width; X Ray Spectra; Astrophysics full text sources ADS | data products SIMBAD (25) NED (3)
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