Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..521u&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Sept. 15, 1987, p. 521-531.
Astronomy and Astrophysics
Astronomy
66
Active Galaxies, Astronomical Spectroscopy, Galactic Structure, Radiant Flux Density, Radio Spectra, X Ray Spectra, Emission Spectra, Spectrum Analysis, Very Large Array (Vla)
Scientific paper
The authors present radio observations of a hard X-ray selected sample of active galaxies, made with the VLA and Parkes radio telescopes. All of the galaxies observed with the VLA were detected, making this an excellent sample with which to look at the relationship between the radio and X-ray emission from active galaxies. The authors use the ratio of the radio to X-ray flux density as a measure of the degree of "radio-loudness" of an active galaxy. They find no evidence for distinct "radio-quiet" and "radio-loud" populations, rather there is a continuous distribution of the degree of radio-loudness amongst the sample galaxies. The X-ray and radio luminosity are found to be correlated. The correlation is not linear, the radio-loud objects all having high X-ray luminosity.
Elvis Martin
Lawrence Andy
Unger Stephen W.
Wilson Andrew S.
Wright Alan E.
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