X-ray studies of quasars with the Einstein Observatory. III. The 3CR sample.
Abstract
Using X-ray emission detected by the Einstein Observatory from each of the 33 3CR quasars in Schmidt's complete sample, it is demonstrated that there is a relationship between the X-ray emission and centimeter wavelength radio emission even for steep-spectrum quasars, provided that only the radio emission from the central object is considered. The observations are summarized, and the estimation of the X-ray luminosity distribution, rather narrow compared to the radio and optical luminosity distributions, is presented. The relationship between X-ray and radio emission is discussed, as is the cosmological evolution of the X-ray luminosity function. The relationship between X-ray and optical luminosity provides an explanation for the finding that X-ray selected quasars have lower redshifts than optically selected quasars of the same optical magnitude.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1983
- DOI:
- 10.1086/160929
- Bibcode:
- 1983ApJ...268...60T
- Keywords:
-
- Centimeter Waves;
- Extragalactic Radio Sources;
- Luminosity;
- Quasars;
- X Ray Sources;
- Distribution Functions;
- Emission Spectra;
- Heao 2;
- Radio Spectra;
- Red Shift;
- Regression Analysis;
- Astrophysics