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A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-0065-2933
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2016 (English)In: Galaxies, E-ISSN 2075-4434, Vol. 4, no 3, 11Article in journal (Refereed) Published
Abstract [en]

The discovery by the Large Area Telescope on board Fermi of variable -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 -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 -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.

Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 4, no 3, 11
Keyword [en]
galaxies: nuclei, galaxies: jets, galaxies: Seyfert, gamma-rays: general
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-196431DOI: 10.3390/galaxies4030011ISI: 000385480600004OAI: diva2:1050620

QC 20161129

Available from: 2016-11-29 Created: 2016-11-14 Last updated: 2016-11-29Bibliographically approved

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Larsson, Josefin
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