LBA observations for project V590 semester 2020APRS

With their sizes larger than 0.7 Mpc, Giant Radio Galaxies (GRGs) are the largest individual\r\nobjects in the Universe. To date, the reason why they reach such enormous extensions is still\r\nunclear. One of the proposed scenarios suggests that they are the result of multiple episodes\r\nof jet activity. Cross-correlating the INTEGRAL+Swift hard X-ray AGN population with radio\r\ncatalogs (NVSS, FIRST, SUMSS), we found that 22% of the sources are GRG: a factor four\r\nhigher than those selected from radio catalogues. Remarkably, all of the sample sources\r\nshows signs of restarting radio activity, either showing a young radio source in their core or\r\nfrom their morphology. With this proposal, we aim at studying at high resolution the cores of\r\nthese GRGs, in terms of magnetic fields, brightness temperature, compactness, and\r\norientation of the newborn jets, comparing that with a control sample of hard X-ray "quiet"\r\nGRGs (i.e. not detected in the mentioned INTEGRAL and Swift catalogues). This will allow us\r\nto probe any dependence of the radio phase on the hard X-ray luminosity, and thus on the\r\naccretion status, unveiling the properties of the cores able to form these unique radio\r\nstructures.