The structure of Cygnus A at 150 MHz

Details The structure of Cygnus A at 150 MHz The structure of Cygnus A at 150 MHz

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..931w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, Sept. 1980, p. 931-944.

Astronomy and Astrophysics

Astronomy

45

Cygnus Constellation, Galactic Structure, Radio Galaxies, Angular Resolution, Astronomical Maps, Emission Spectra, Fourier Transformation, Galactic Evolution, Galactic Radiation, Interstellar Magnetic Fields, Mathematical Models, Radio Astronomy, Radio Spectra, Relativistic Particles, Synchrotron Radiation

Scientific paper

Observations of the structure of Cyg A at 150 MHz with a resolution of 10.5 x 16 arcsec show a strong bridge of emission linking the two components. Radio spectra between 150 MHz and 5 GHz at points along the bridge are consistent with a model in which the hot spots move outwards at a roughly uniform velocity and leave behind a population of electrons which subsequently ages by synchrotron losses in a magnetic field of 5 x 10 to the -9th T. The total age of Cyg A deduced is 6,000,000 yr and the mean expansion speed is 0.05 c. An upper limit is set to the speed of mixing of the relativistic electrons.

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