Classical double sources in the directions of rich clusters of galaxies

Details Classical double sources in the directions of rich clusters of galaxies Classical double sources in the directions of rich clusters of galaxies

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83..312b&link_type=abstract

Astronomical Journal, vol. 83, Apr. 1978, p. 312-321.

Astronomy and Astrophysics

Astronomy

15

Galactic Clusters, Galactic Radiation, Intergalactic Media, Microwave Emission, Radio Sources (Astronomy), Astronomical Maps, Brightness, Galactic Structure, Polarized Electromagnetic Radiation, Turbulence Effects

Scientific paper

Interferometric observations of two classical double radio sources (0816+526 and 1232+414) located in the directions of rich Abell clusters of galaxies are reported. Total-intensity and polarized-intensity maps of the two sources obtained at 2695 and 8085 MHz are presented, and the integrated source properties are summarized. The spectral indices, degrees of polarization, and rotation measures along the source major axes are analyzed. The observed and derived parameters are examined in the context of current theoretical models, particularly the single- and double-ejection plasmoid models. For the single-ejection model, the ram pressure necessary to confine the double source components with 'equipartition' velocity is found to produce a low value for the density of the intergalactic medium, which may be reasonable if the sources are not members of the coincident clusters. It is noted that a continous resupply of particles seems most consistent with the derived and observed physical source parameters if the sources are cluster members.

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