X-ray, optical, and radio properties of quasars

Abstract

view Abstract Citations (63) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-ray, optical, and radio properties of quasars. Blumenthal, G. R. ; Keel, W. C. ; Miller, J. S. Abstract A sample of 26 low-redshift quasars was examined for relationships between X-ray luminosity and optical spectroscopic features; all quasars were observed with the Einstein Observatory and with the IDS on the Lick 3 meter telescope. Evidence is found for correlations between quasar X-ray luminosity and both optical continuum luminosity and H-beta luminosity. In the latter case, there is a smooth relationship connecting quasars, Seyfert 1, and Seyfert 2 galaxies. For the quasars in this sample, there is also a strong correlation between optical continuum luminosity and both the H-beta luminosity and equivalent width. Evidence is also found for a weak correlation between alpha-prime (ox), the mean continuum spectral index between 5000 A and 2 keV, and Fe II equivalent width, H-beta equivalent width, H-beta line width at zero intensity, and the ratio of H-beta equivalent width to its line width at zero intensity. Publication: The Astrophysical Journal Pub Date: June 1982 DOI: 10.1086/160007 Bibcode: 1982ApJ...257..499B Keywords: Astronomical Spectroscopy; Luminosity; Quasars; Radio Spectra; Red Shift; X Ray Sources; Emission Spectra; Galactic Nuclei; H Beta Line; Light Emission; Seyfert Galaxies; Spectral Line Width; Astrophysics full text sources ADS | data products SIMBAD (26) NED (24)