230 GHz observations of the radio galaxies Cygnus A and Virgo A

Details 230 GHz observations of the radio galaxies Cygnus A and Virgo A 230 GHz observations of the radio galaxies Cygnus A and Virgo A

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220...42s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 42-48.

Astronomy and Astrophysics

Astrophysics

26

Astronomical Maps, Radio Galaxies, Synchrotron Radiation, Extremely High Frequencies, Virgo Galactic Cluster

Scientific paper

Cyngus A was mapped at 230 GHz, and Virgo at 151 GHz and 230 GHz, with a resolution of 11 arcsec. At 230 GHz, the results show a smooth continuation of the lower frequency trends in all cases, except for a possible suggestion of spectral steepening above 100 GHz for the Sf hotspot of Cygnus A. The spectra of the two galaxy nuclei are found to differ significantly in the infrared, with Cygnus A displaying an infrared excess presumably due to thermal emission from dust, and the spectrum for Virgo A being consistent with dominant nonthermal emission from the radio to the infrared.

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