XMM-Newton spectrum of the radio-loud quasar 3C 215: slim accretion disk or SMBH binary?

Abstract

Context. Radio-loud active galactic nuclei (RL AGNs) show very powerful jet emission in the radio band, while the radio-quiet (RQ) ones do not. This RL-RQ dichotomy would imply a sharp difference between these two classes, but modern theoretical models and observations suggest a common nuclear environment possibly with different working