The nature of radio-quiet quasars

Details The nature of radio-quiet quasars The nature of radio-quiet quasars

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...219...87c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 219, no. 1-2, July 1989, p. 87-97.

Astronomy and Astrophysics

Astronomy

89

Astronomical Spectroscopy, Quasars, Radio Galaxies, Starburst Galaxies, Active Galactic Nuclei, Cosmic Dust, Far Infrared Radiation, Infrared Astronomy Satellite, Radio Emission, X Ray Spectra

Scientific paper

The present 1.3 mm continuum observations of all 'radio-quiet' quasars with good IRAS observations show emission that is so weak compared to the 100-micron emission as to suggest that dust emission on kpc scale, powered by the active nucleus, explains the FIR spectrum. The radio emission appears to be dominated by weak radio galaxy emission in most cases, and only rarely by normal spiral galaxy disk emission. In a two-color diagram of radio to far-infrared spectral index versus far-infrared to X-ray spectral index starburst galaxies, the various kinds of Seyfert galaxies and radio galaxies are clearly separated. Sensitive radio observations of radio-weak quasars require both spectral and high spatial resolution before one can infer any contribution of relativistically boosted emission.

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