Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies

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 $\gamma$-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 $\gamma$-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 $\gamma$-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.

arXiv comment32 pages, 12 figures, 1 table. Review for the Special Issue 'Particle Acceleration Processes in Astrophysical Jets' of the journal Galaxies; Eds.: B. Kapanadze, P. A. Hughes

References in corpus (94)

• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• The Relation between Black Hole Mass, Bulge Mass, and Near-Infrared Luminosity
• The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei
• Modeling the Extragalactic Background Light from Stars and Dust
• Radio-Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications
• Probing the Inner Jet of the Quasar PKS 1510-089 with Multi-waveband Monitoring during Strong Gamma-ray Activity
• Is the soft excess in AGN real?
• The power of relativistic jets is larger than the luminosity of their accretion disks
• Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• The AGN Black Hole Mass Database
• 3FHL: The Third Catalog of Hard Fermi-LAT Sources
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: II. Spectral Analysis and Correlations
• Radio-loud Narrow-Line Type 1 Quasars
• A change in the optical polarization associated with a gamma-ray flare in the blazar 3C 279
• Radio-Loud Narrow-Line Seyfert 1 as a New Class of Gamma-Ray AGN
• 2FHL: The Second Catalog of Hard Fermi-LAT Sources
• The Simultaneous Optical-to-X-ray Spectral Energy Distribution of Soft X-ray Selected AGN observed by Swift
• The 22-Month Swift-BAT All-Sky Hard X-ray Survey
• Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022
• M-BH - sigma relation for a Complete Sample of Soft X-ray Selected AGNs
• Blazar spectral variability as explained by a twisting inhomogeneous jet
• An evolutionary scenario for blazar unification
• Black hole mass estimate for a sample of radio-loud narrow-line Seyfert 1 galaxies
• A Catalog of Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Data Release 12
• ROSAT monitoring of persistent giant and rapid variability in the narrow-line Seyfert 1 galaxy IRAS 13224-3809
• The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling
• SBS 0846+513: a new gamma-ray emitting Narrow-Line Seyfert 1 galaxy
• On the origin of gamma rays in Fermi blazars: beyond the broad line region
• The Parsec-Scale Structure and Jet Motions of the TeV Blazars 1ES 1959+650, PKS 2155-304, and 1ES 2344+514
• The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
• RoboPol: The optical polarization of gamma-ray--loud and gamma-ray--quiet blazars
• On the origin of radio-loudness in AGNs and its relationship with the properties of the central supermassive black hole
• The effect of nuclear gas distribution on the mass determination of supermassive black holes
• Narrow-Line Seyfert 1s: 15 Years Later
• SDSS-V: Pioneering Panoptic Spectroscopy
• Active galactic nuclei at z ~ 1.5: I. Spectral energy distribution and accretion discs
• The colour of the narrow line Sy1-blazar 0324+3410
• The Role of Secular Evolution in the Black Hole Growth of Narrow-Line Seyfert 1 Galaxies
• A spectroscopic analysis of a sample of narrow-line Seyfert 1 galaxies selected from the Sloan Digital Sky Survey
• The optical morphologies of the 2Jy sample of radio galaxies: evidence for galaxy interactions
• H.E.S.S. discovery of VHE gamma-rays from the quasar PKS 1510-089
• RoboPol: optical polarization-plane rotations and flaring activity in blazars
• RoboPol: Connection between optical polarization plane rotations and gamma-ray flares in blazars
• Gamma rays from the quasar PKS 1441+25: story of an escape
• Synchrotron Polarization in Blazars
• Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
• Radio jet emission from GeV-emitting narrow-line Seyfert 1 galaxies
• Detection of very high energy gamma-ray emission from the gravitationally-lensed blazar QSO B0218+357 with the MAGIC telescopes
• A Bar Fuels a Super-Massive Black Hole?: Host Galaxies of Narrow-Line Seyfert 1 Galaxies
• The Peculiar Radio-Loud Narrow Line Seyfert 1 Galaxy 1H 0323+342
• Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry
• Observatory science with eXTP
• New Fermi-LAT event reconstruction reveals more high-energy gamma rays from Gamma-ray bursts
• Soft X-ray properties of "narrow-line" Seyfert 1 galaxies
• The X-ray view of Giga-Hertz Peaked Spectrum Radio Galaxies
• Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011
• The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
• Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
• Supermassive black holes in the Sbc spiral galaxies NGC 3310, NGC 4303 and NGC 4258
• Variability of the blazar 4C 38.41 (B3 1633+382) from GHz frequencies to GeV energies
• Intranight optical variability of γ-ray loud Narrow Line Seyfert 1 galaxies
• Multifrequency studies of the narrow-line Seyfert 1 galaxy SBS 0846+513
• Supermassive black hole mass measurements for NGC 1300 and NGC 2748 based on HST emission-line gas kinematics
• The most powerful flaring activity from the NLSy1 PMN J0948+0022
• Discovery of rare double-lobe radio galaxies hosted in spiral galaxies
• An orientation-based unification of young jetted AGN: the case of 3C 286
• SDSSJ143244.91+301435.3: a link between radio-loud narrow-line Seyfert 1 galaxies and compact steep-spectrum radio sources?
• Long-term monitoring of PKS 0537-441 with Fermi-LAT and multiwavelength observations
• Uncovering the host galaxy of the $\gamma$-ray-emitting narrow-line Seyfert 1 galaxy FBQS J1644+2619
• Investigation on Young radio AGNs based on SDSS spectroscopy
• The ordinary life of the gamma-ray emitting narrow-line Seyfert 1 galaxy PKS 1502+036
• Blazar nuclei in radio-loud narrow-line Seyfert 1?
• On the black hole mass of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• Large-scale environments of narrow-line Seyfert 1 galaxies
• Calibration of the virial factor $f$ in supermassive black hole masses of reverberation-mapped AGNs
• The relativistic jet of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• Upper limits from five years of blazar observations with the VERITAS Cherenkov telescopes
• Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array
• SDSS J211852.96-073227.5: a new γ-ray flaring narrow-line Seyfert 1 galaxy
• A Search for TeV Gamma-Ray Emission from High-Peaked Flat Spectrum Radio Quasars Using the Whipple Air-Cherenkov Telescope
• Multiwavelength observations of the gamma-ray emitting narrow-line Seyfert 1 PMN J0948+0022 in 2011
• Evidence of bar--driven secular evolution in the gamma--ray narrow--line Seyfert 1 galaxy FBQS J164442.5+261913
• The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 I. The X-Ray View
• The host galaxy of the gamma-ray-emitting narrow-line Seyfert 1 galaxy PKS 1502+036
• The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
• Broadband Observations of the Gamma-ray Emitting Narrow Line Seyfert 1 Galaxy SBS 0846+513
• Parsec-scale jet properties of the gamma-ray quasar 3C 286
• Intra-Night Optical monitoring of three γ-ray detected Narrow-line Seyfert 1 galaxies
• "Flat" broad line region and gamma-ray absorption in blazars
• PKS 2123-463: a confirmed gamma-ray blazar at high redshift
• Radio jet structures at ~100 parsec and larger scales of the $\gamma$-ray-emitting narrow-line Seyfert 1 galaxy PMN J0948+0022
• The relativistic jet of the $\gamma$-ray emitting narrow-line Seyfert 1 galaxy PKS J1222$+$0413
• High resolution radio observations of gamma-ray emitting Narrow-Line Seyfert 1s