The empirical difference between radio-loud and radio-quiet quasars

Details The empirical difference between radio-loud and radio-quiet quasars The empirical difference between radio-loud and radio-quiet quasars

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..416a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 20, 1990, p. 416-418.

Astronomy and Astrophysics

Astronomy

46

Astronomical Spectroscopy, Quasars, Radio Sources (Astronomy), Spectral Energy Distribution, Infrared Sources (Astronomy), Ultraviolet Spectra

Scientific paper

Lobe-dominant radio quasars and radio-quiet quasars have very similar spectral energy distributions in the infrared through ultraviolet spectral regions. The former class show flat-spectrum radio synchrotron cores as well. Are the radio cores the self-absorbed tails of nonthermal infrared sources, or are they separate components with properties expected for misdirected relativistic jets? Morphologically, do the spectra peak in the millimeter region as expected under the first hypothesis, or do they show deep minima there as expected under the second? Centimeter, infrared, and new millimeter observations show that the second hypothesis is correct for all six known IRAS-detected lobe-dominant quasars.

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