Radio-loud narrow-line Seyfert 1 as a new class of gamma-ray active galactic nuclei

Abdo, A. A. AAA. A. AAAbdoAckermann, M.M.AckermannAjello, M.M.Ajello2020-09-172020-09-172009-12-01https://hdl.handle.net/20.500.13025/2797We report the discovery with Fermi/LAT of Â³-ray emission from three radio-loud narrow-line Seyfert 1 galaxies: PKS 1502+036 (z = 0.409), 1H 0323+342 (z = 0.061), and PKS 2004 447 (z = 0.24). In addition to PMN J0948+0022 (z = 0.585), the first source of this type to be detected in Â³ rays, they may form an emerging new class of Â³-ray active galactic nuclei (AGNs). These findings can have strong implications on our knowledge about relativistic jets and the unified model of the AGN.Radio-loud narrow-line Seyfert 1 as a new class of gamma-ray active galactic nucleiArticle Journalhttp://iopscience.iop.org/1538-4357/707/2/L142http://dx.doi.org/10.1088/0004-637X/707/2/L14254dcce0b8580fe1368eeb34a