Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..601b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, June 1, 1987, p. 601-627.
Astronomy and Astrophysics
Astronomy
119
Luminosity, Quasars, Radio Sources (Astronomy), X Ray Sources, Astronomical Spectroscopy, Continuous Radiation, Correlation, Doppler Effect
Scientific paper
The authors examine the correlations of X-ray and optical luminosities with radio properties for radio-selected quasars. A remarkably strong correlation is found to exist between the total radio luminosity (irrespective of whether it comes from a compact core or extended lobes) and the X-ray luminosity. A weaker correlation is found between the radio luminosity and the optical luminosity. The results are consistent with a two-component origin for the optical/X-ray emission, one isotropic and one relativistically beamed. This model also accounts for the change of slope with radio structure for the radio/X-ray luminosity correlation noted by Kembhavi et al. (1986). Quasars with flat radio spectra are found to have smaller emission-line equivalent widths than do steep-spectrum quasars, again in the sense predicted by the beaming hypothesis.
Browne Ian W. A.
Murphy David W.
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