Jetted Active Galactic Nuclei
INAF – Osservatorio Astronomico di Brera
Villa Magliola seminars room
The discovery of high-energy gamma rays from Narrow-Line Seyfert 1 galaxies has deep implications on the theory of relativistic jets. These objects are powered by small-mass highly-accreting black holes, which implies that the hypothesis of a mass threshold to generate relativistic jets no longer stands. Other important implications are the breakdown of the so-called blazar sequence, the possibility to unify relativistic jets from X-ray binaries (XRBs) and Active Galactic Nuclei (AGN), and a revision of the cosmological evolution of jetted AGN. Last, but not least, the emerging of a new class of jetted AGN suggested a revision of the classification of the gamma-ray point sources populations, to search for other underestimated classes of jetted AGN. After a more than three years long work aimed at classify a sample of 2980 gamma-ray sources from the IV Fermi LAT catalog, it is possible to confirm that the zoo of jetted AGN is more variegated than previously thought.