Coordinated photometric and spectroscopic observations of strong extragalactic 90 GHz sources

Details Coordinated photometric and spectroscopic observations of strong extragalactic 90 GHz sources Coordinated photometric and spectroscopic observations of strong extragalactic 90 GHz sources

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224...22o&link_type=abstract

Astrophysical Journal, Part 1, vol. 224, Aug. 15, 1978, p. 22-31. NASA-NSF-supported research.

Astronomy and Astrophysics

Astrophysics

77

Astronomical Photometry, Astronomical Spectroscopy, Extragalactic Radio Sources, Microwave Emission, Millimeter Waves, Synchrotron Radiation, Infrared Radiation, Light (Visible Radiation), Radio Emission, Spectral Energy Distribution

Scientific paper

Nearly simultaneous radio and infrared-optical observations were obtained for several extragalactic radio sources which are strong at 90 GHz. The spectral-flux distributions are generally peaked or flat over the radio portion of the spectrum with a steeper, power-law behavior at infrared-optical frequencies. For all sources, the radio and infrared-optical portions of the spectral-flux distributions can be smoothly joined by physically sensible interpolations over the spectral gap, although spectral breaks are required. For many of the sources, this is consistent with a common (synchrotron) origin of the radio, millimeter, and infrared-optical radiation. However, proof, in terms of correlated temporal variations and polarization properties, is still generally lacking.

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