F. D'Ammando, M. Orienti, J. Finke, J. Larsson, M. Giroletti, on behalf of the Fermi LAT Collaboration, C. M. Raiteri
Published 2016-09-14Version 1
The discovery by the Large Area Telescope on board Fermi of variable gamma-ray emission from radio-loud narrow-line Seyfert 1 (NLSy1) galaxies revealed the presence of a possible third class of Active Galactic Nuclei (AGN) with relativistic jets in addition to blazars and radio galaxies. Considering that NLSy1 are usually hosted in spiral galaxies, this finding poses intriguing questions about the nature of these objects and the formation of relativistic jets. We report on a systematic investigation of the gamma-ray properties of a sample of radio-loud NLSy1, including the detection of new objects, using 7 years of Fermi-LAT data with the new Pass 8 event-level analysis. In addition we discuss the radio-to-very-high-energy properties of the gamma-ray emitting NLSy1, their host galaxy, and black hole mass in the context of the blazar scenario and the unification of relativistic jets at different scales.
Comments: 11 pages, 2 figures. Accepted for publication in the special issue of Galaxies, "Blazars through Sharp Multi-wavelength Eyes", edited by J. L. Gomez, A. P. Marscher, and S. G. Jorstad. arXiv admin note: text overlap with arXiv:1503.01480
Controversy of the GRO J1655-40 black hole mass and spin estimates and its possible solutions
Spectral properties of NGC 4151 and the Estimation of black hole mass using TCAF solution
Ensemble X-ray variability of optically selected QSOs: dependence on black hole mass and Eddington ratio
![QR code for arXiv:1609.04434 [astro-ph.HE]](http://oss.arxitics.com/images/favicon.svg)