Observations of the Coma Cluster of galaxies /A 1656/ at frequency 102.5 MHz

Details Observations of the Coma Cluster of galaxies /A 1656/ at frequency 102.5 MHz Observations of the Coma Cluster of galaxies /A 1656/ at frequency 102.5 MHz

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982afz....18..177g&link_type=abstract

(Astrofizika, vol. 18, Apr.-June 1982, p. 177-191.) Astrophysics, vol. 18, no. 2, Oct. 1982, p. 107-116. Translation.

Astronomy and Astrophysics

Astrophysics

1

Brightness Distribution, Galactic Clusters, Galactic Radio Waves, Long Wave Radiation, Radio Galaxies, Background Radiation, Galactic Structure, Halos, Intergalactic Media, Particle Acceleration, Radiant Flux Density, Radio Spectra, Relativistic Particles

Scientific paper

The results of observations of the galaxy cluster Abell 1656 in the constellation Coma Berenices at 102.5 MHz are presented. The observations were made with a meridian large phase array telescope and a cross-type wide-range telescope, and a chart of the brightness distribution with resolution 48 arcmin by 26 arcmin and a strip distribution of the brightness of the cluster with 10 arcmin resolution were obtained. The flux and dimensions of the radio source Coma C, the confusion effect, the contribution of individual discrete sources, the fluctuations in the galactic background, and the flux of the radio halo were evaluated. It is shown that not far from the radio source Coma C there is one further extended radio source with flux 7 + or -2 Jy and a steep spectrum. It is argued that the large extension of the radio halo must be due to an effective mechanism of acceleration or reacceleration of the relativistic particles in the intergalactic medium of the cluster.

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