In a growing number of galaxy clusters diffuse extended radio sources have been found.
These sources are not directly associated with individual cluster galaxies. The radio …

We present the first results of the search of new halo and relic candidates in the NRAO VLA
Sky Survey. We have inspected a sample of 205 clusters from the X-ray-brightest Abell-type …

We report the discovery and study of the most distant radio galaxy observed to date. A
multispectral investigation of the ultrasteep spectrum radio Source 4C 41.17 has identified a …

New radio data are presented for the clusters A401, A545, A754, A1914, A2219 and A2390,
where the presence of diffuse radio emission was suggested from the images of the NRAO …

A number of merging galaxy clusters show the presence of shocks and cold fronts, ie sharp
discontinuities in surface brightness and temperature. The observation of these features …

The nearby, extremely powerful radio galaxy Cygnus A stands out as having an atypically
low far-infrared/radio luminosity ratio. It is demonstrated that in objects displaying such a low …

We present a spectral aging study of a sample of 5 giant radio galaxies based on radio
continuum data obtained at frequencies between 326 MHz and 10.6 GHz. Using synchrotron …

We have performed sensitive polarimetric radio observations with the VLA of three galaxies:
PKS 0745-191, PKS 1508+ 059, and PKS 2354-350, embedded in x-ray cooling flow …

ABSTRACT We present new Giant Metrewave Radio Telescope observations at 235 MHz
and 610 MHz of 18 X-ray bright galaxy groups. These observations are part of an extended …

Recently a theoretical model has been proposed that accounts for the origin of radio mini-
halos observed in some cooling flow clusters as related to electron re-acceleration by MHD …