Hot spots in Cygnus A at 89 GHz

Details Hot spots in Cygnus A at 89 GHz Hot spots in Cygnus A at 89 GHz

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281..135w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 281, June 1, 1984, p. 135-140.

Astronomy and Astrophysics

Astrophysics

26

Extremely High Frequencies, Galactic Structure, Radio Galaxies, Astronomical Maps, Flux Density, Linear Polarization, Radio Spectra, Very Long Base Interferometry

Scientific paper

The Hat Creek interferometer was used at 89 GHz to map the radio source Cygnus A (3C 405) to a resolution 1arcsec.5×2arcsec.8. The hot spots in the radio lobes have straight spectra with spectral indices 0.98±0.02, significantly flatter than the lobe emission of 1.34±0.05. No features corresponding to electron aging have been found in the hot spots. The central component has a flux density of 0.7±0.07 Jy. The spectrum of the central component is well fitted by a simple model based on the VLBI structure, with core and jet magnetic fields less than about 1 mT.

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