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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29355
Title: Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies
Authors: D'AMMANDO, FILIPPO 
Issue Date: 2019
Journal: GALAXIES 
Number: 7
Issue: 4
First Page: 87
Abstract: Before the launch of the Fermi Gamma-ray Space Telescope satellite only two classes of active galactic nuclei (AGN) were known to generate relativistic jets and thus to emit up to the γ -ray energy range: blazars and radio galaxies, both hosted in giant elliptical galaxies. The discovery by the Large Area Telescope (LAT) on-board the Fermi satellite of variable γ -ray emission from a few radio-loud narrow-line Seyfert 1 galaxies (NLSy1) revealed the presence of an emerging third class of AGN with powerful relativistic jets. Considering that NLSy1 are usually hosted in late-type galaxies with relatively small black hole masses, this finding opened new challenging questions about the nature of these objects, the disc/jet connection, the emission mechanisms at high energies, and the formation of relativistic jets. In this review, I will discuss the broad-band properties of the γ -ray-emitting NLSy1 included in the Fourth Fermi LAT source catalog, highlighting major findings and open questions regarding jet physics, black hole mass estimation, host galaxy and accretion process of these sources in the Fermi era.
URI: http://hdl.handle.net/20.500.12386/29355
URL: https://www.mdpi.com/2075-4434/7/4/87/htm
ISSN: 2075-4434
DOI: 10.3390/galaxies7040087
Bibcode ADS: 2019Galax...7...87D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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1911.03500.pdfpostprint2.74 MBAdobe PDFView/Open
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