The recent discovery by Fermi/LAT of high-energy (E>100 MeV) gamma rays from Narrow-Line Seyfert 1 Galaxies (NLS1s) made evident the existence of a third class of gamma-ray emitting Active Galactic Nuclei (AGN), after blazars and radio galaxies. It is now possible to study a rather unexplored range of low masses (10^6-8 Msun) and high accretion rates (up to the Eddington limit) of AGN with relativistic jets. A comparison with the jet emission from Galactic compact objects shows some striking similarities, indicating that NLS1s are the low-mass counterpart of blazars as neutron stars are the low-mass jet systems analogue of stellar mass black holes.
@article{arxiv.1209.4776,
title = {Gamma-ray emission from Narrow-Line Seyfert 1 Galaxies and implications on the jets unification},
author = {Luigi Foschini},
journal= {arXiv preprint arXiv:1209.4776},
year = {2015}
}
Comments
4 pages, 3 figures. Proceedings of Gamma2012 - V International Symposium on Gamma-Ray Astronomy, Heidelberg (Germany), 9-13 July 2012