Chandra observations of gamma-ray emitting radio galaxies

Important information on the evolution of a jet can be obtained by comparing the physical state of the plasma at its propagation through the broad-line region (where the jet is most likely formed) into the intergalactic medium, where it starts to decelerate significantly. This approach can be fruitfully applied to sources having a large-scale jet long enough to be resolved by Chandra telescope. This is why, from the Fermi Large Area Telescope (Fermi LAT) third source catalog we have selected radio galaxies that have a knot or hot-spot structure in their large-scale jet. We compare the constraints on the physical parameters in the innermost ( kpc) regions of the same jet by means of a detailed multiwavelength analysis and theoretical modeling of the broadband spectra of M87, Pictor A, 3C 303, 3C 275.1, NGC 6251, 3C 207, 3C 111 and 3C 120.