出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：About two-dozen of very Radio-Loud Narrow-line Seyfert 1s (RL-NLSy1s) have been proposed as blazar candidates in 2008 by Yuan and collaborators. The detection at gamma-rays of a few RL-NLSy1s has confirmed the blazar-like nature of the objects and suggested that RL-NLSy1s are a new class of gamma-ray AGN.With this starting point, we analysed archival X-ray observations of RL-NLSy1s with the goal of finding similarities and differences with respect to the well X-ray characterized population of Radio-Quiet NLSy1s. We focus here on the soft excess contribution to X-ray spectra as a function of radio loudness. The study described here is designed to provide for the first time constraints on the relative strength of the accretion- and the jet-powered contribution to the X-ray emission of RL-NLSy1s.
