Multifrequency observations of very large radio galaxies. I - 3C 326

Details Multifrequency observations of very large radio galaxies. I - 3C 326 Multifrequency observations of very large radio galaxies. I - 3C 326

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....62..375w&link_type=abstract

Astronomy and Astrophysics, vol. 62, no. 3, Jan. 1978, p. 375-392.

Astronomy and Astrophysics

Astronomy

89

Galactic Structure, Radio Astronomy, Radio Galaxies, Astronomical Maps, Emission Spectra, Linear Polarization, Magnetic Field Configurations, Magnetic Flux, Particle Acceleration, Plasma Turbulence, Radiant Flux Density, Relativistic Particles

Scientific paper

Results are reported for observations of the radio source 3C 326 at wavelengths of 6, 21, and 49 cm. The distributions of spectral index, rotation measure, and depolarization over the source are determined together with the distribution of the source's magnetic field projected onto the plane of the sky. It is found that 3C 326 is a giant radio galaxy with a projected linear extent of about 1.7 Mpc, that the source most likely does not lie within a cluster of glaxies, and that the projected magnetic field is oriented predominantly along the major axis of the radio source. The spectral index is shown to experience a very small variation over distances of hundreds of kiloparsecs, implying that local in-situ acceleration of relativistic electrons must occur in the outer radio lobes and probably throughout the entire radio-emitting region. It is concluded that plasma turbulence may account for some of the acceleration but cannot occur throughout the entire radio source and that no single compact feature contains a predominant amount of flux density.

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