31.4- and 89.6-GHz flux density measurements of extragalactic radio sources

Details 31.4- and 89.6-GHz flux density measurements of extragalactic radio sources 31.4- and 89.6-GHz flux density measurements of extragalactic radio sources

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1306g&link_type=abstract

Astronomical Journal, vol. 86, Sept. 1981, p. 1306-1311.

Astronomy and Astrophysics

Astronomy

28

Extragalactic Radio Sources, Radiant Flux Density, Radio Astronomy, Quasars, Radio Spectra, Spectral Energy Distribution

Scientific paper

In addition to presenting measurements at 31.4 GHz for 333 radio sources from 2.7- and 5-GHz surveys, results are given of 89.6 GHz observations of selected objects that are known or suspected to have inverted radio spectra between 5 and 31.4 GHz. It is shown that while many of the sources show steepening radio spectra with radio frequency increases, the combination of these results with those of a previous study shows that more than half of the sources measured have radio spectra in the 5-31.4 GHz range that are as flat as those determined for 2.7-5 GHz range. It is expected that these flat-spectrum sources contain components that are opaque at short-centimeter wavelengths.

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