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.

Diagram of the gravitational parameter

Local contact: Alberto Vecchiato
OATo seminars contact: Paola Re Fiorentin – Roberto Susino