Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..596w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 15, 1987, p. 596-606. Research supported by the Smithsonian Insti
Astronomy and Astrophysics
Astronomy
120
Quasars, Radio Emission, Spaceborne Astronomy, X Ray Astronomy, Astronomical Catalogs, Data Sampling, Heao 2, Luminosity, Statistical Analysis
Scientific paper
Using a sample of 114 radio-loud quasars observed with the Einstein Observatory, the authors study the joint dependence of X-ray luminosity on radio and optical luminosities. By comparing these results with those obtained from a large sample of radio-quiet quasars, the authors confirm that radio-loud quasars are, on the average, more X-ray luminous (for a given optical luminosity) than radio-quiet quasars. A detailed statistical analysis of the sample of radio-loud quasars is presented. The data are consistent with radio-loud quasars having a physical component, not directly related to the optical luminosity, which produces the core radio luminosity plus an "extra" X-ray emission. This extra component would dominate the observed X-ray flux in the majority of radio-loud quasars with flat radio spectra.
Giommi Paolo
Tananbaum Harvey
Worrall Diana Mary
Zamorani Gianni
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