The 102.5-MHz emission of Abell clusters with Z = 0.02-0.075. I - South-latitude clusters

Astronomy and Astrophysics – Astronomy

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Astronomical Catalogs, Emission Spectra, Galactic Clusters, Galactic Radio Waves, Astrometry, Radial Velocity, Radio Emission, Red Shift

Scientific paper

A sample of 121 Abell clusters of galaxies with measured redshifts from 0.02 to 0.075, δ = -10° to +80° is presented. The completeness with respect to Abell's catalog is 80%. The completeness of the sample in function of distance was constructed and the mean cluster density of 1.5×10-6 Mpc-3 was derived. Observations at 102.5 MHz of 39 clusters southward from the galactic plane were carried out. Flux density measurements for radio sources in the directions of the clusters have been made, integrated fluxes of clusters and luminosity estimates for their radio halos are presented. Radio emission of 11 clusters was detected, and for two of these and for eight other clusters, radio sources were detected in the directions to the outskirts of clusters.

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