Program: GN-2020B-Q-308

Title:Are powerful radio sources alone? The case of 3CR 430.
PI:Victoria Reynaldi
Co-I(s): Ileana Andruchow, Francesco Massaro, Juan Madrid, Ana Jiménez, Iván López

Abstract

3C 430 is a FR II powerful source, so it has been longly considered as an isolated radiogalaxy. In spite of its radio power, its optical spectrum show no signatures of high excitation (HE), it is a Low Excitation Radio Galaxy (LERG). And LERGs, unlike FR II sources, are found in both populated and unpopulated environments. Recently it was shown that, in the local universe, FRis and FRiis as well as HERGs and LERGs live in galaxy-rich large-scale environments that have the same richness and characteristics. Our team have found both X-ray (Chandra, 0.5-3 keV) and radio (TGSS, 150 MHz) hundred-kpc-scale extended emission in the 3C 430 neighborhood, suggesting the existence of a merging cluster in its very location. We aim at characterizing the 3C 430 environment. And to do so, we propose to perform a Multi-Object Spectroscopy on the field sources, specially those that overlap the extended emission.