Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future

Abstract

This article reviews our current understanding about $\gamma$-ray detected narrow-line Seyfert 1 ($\gamma$-NLSy1) galaxies. The detection with the Large Area Telescope onboard {\it Fermi}~Gamma-ray Space Telescope has provided the strongest evidence for the presence of closely aligned relativistic jet in these intriguing active galactic nuclei (AGN) and opened up a realm to explore the physical conditions needed to launch the jet in a different central engine and host galaxy environment than that is known for blazars. Promising results acquired from various multi-wavelength campaigns are converging to a scenario in which the $\gamma$-NLSy1 galaxies can be considered as `young' blazars. These enigmatic sources hold the key to unravel the jet triggering mechanism and evolution of the AGN phase of a galaxy, in general. As such, $\gamma$-NLSy1s should be considered as one of the top priority targets for next generation observational facilities.

arXiv commentInvited refereed review, to appear in the Journal of Astrophysics and Astronomy published by Indian Academy of Sciences

References in corpus (189)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• Observational Evidence of AGN Feedback
• A Catalog of Quasar Properties from SDSS DR7
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• A Unifying View of the Spectral Energy Distributions of Blazars
• First Results from the Catalina Real-time Transient Survey
• Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole
• The Spectral Energy Distribution of Fermi bright blazars
• Radio Properties of Infrared Selected Galaxies in the IRAS 2 Jy Sample
• Revisiting the Unified Model of Active Galactic Nuclei
• Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
• Powerful Outflows and Feedback from Active Galactic Nuclei
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• Quasars, their host galaxies, and their central black holes
• Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
• Canonical high power blazars
• Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
• The power of blazar jets
• The power of relativistic jets is larger than the luminosity of their accretion disks
• The Non-Linear Dependence of Flux on Black Hole Mass and Accretion Rate in Core Dominated Jets
• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
• Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
• GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• Constraining Emission Models of Luminous Blazar Sources
• Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• 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
• Radio-Loud Narrow-Line Seyfert 1 as a New Class of Gamma-Ray AGN
• The Last of FIRST: The Final Catalog and Source Identifications
• Broad emission lines for negatively spinning black holes
• Eigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei
• Suzaku observations of 'bare' active galactic nuclei
• A Population of Radio-loud Narrow Line Seyfert 1 Galaxies with Blazar-like Properties?
• The Simultaneous Optical-to-X-ray Spectral Energy Distribution of Soft X-ray Selected AGN observed by Swift
• The effect of radiation pressure on virial black hole mass estimates and the case of Narrow Line Seyfert 1 galaxies
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: I. Observations and Time Series Analysis
• A comparison of the hard ASCA spectral slopes of broad and narrow-line Seyfert 1 galaxies
• MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
• MOJAVE XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz
• Jet opening angles and gamma-ray brightness of AGN
• Spectroscopy of Broad Line Blazars from 1LAC
• GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
• Spectral Properties of Bright Fermi-detected Blazars in the Gamma-ray Band
• 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
• Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C 454.3 in November 2010
• Prograde and Retrograde Black Holes: Whose Jet is More Powerful?
• On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
• Constraining the location of the emitting region in Fermi blazars through rapid gamma-ray variability
• An evolutionary scenario for blazar unification
• Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3
• Black hole mass estimate for a sample of radio-loud narrow-line Seyfert 1 galaxies
• X-ray reflection in the NLS1 1H 0707-495
• Detection of significant cm to sub-mm band radio and gamma-ray correlated variability in Fermi bright blazars
• Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
• A Catalog of Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Data Release 12
• Swift X-ray Telescope Monitoring of Fermi-LAT Gamma Ray Sources of Interest
• Fermi/LAT broad emission line blazars
• Radio Loud and Radio Quiet Quasars
• Enhanced Star Formation in Narrow Line Seyfert 1 AGN revealed by Spitzer
• The NuSTAR spectrum of Mrk 335: Extreme relativistic effects within 2 gravitational radii of the event horizon?
• The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling
• The Blazar Main Sequence
• Compton Dominance and the Blazar Sequence
• A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410
• Searching For the Physical Drivers of Eigenvector 1: Influence of Black Hole Mass and Eddington Ratio
• Super-Eddington accretion rates in Narrow Line Seyfert 1 galaxies
• Are luminous radio-loud active galactic nuclei triggered by galaxy interactions?
• SBS 0846+513: a new gamma-ray emitting Narrow-Line Seyfert 1 galaxy
• Kinematic Linkage Between the Broad and Narrow Line Emitting Gas in AGN
• Are the black hole masses in Narrow Line Seyfert 1 galaxies actually small?
• The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
• Detecting Effects of Filaments on Galaxy Properties in the Sloan Digital Sky Survey III
• Properties of AGN coronae in the NuSTAR era II: hybrid plasma
• 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
• Combined Effects of Galaxy Interactions and Large-Scale Environment on Galaxy Properties
• Kiloparsec-scale Radio Structures in Narrow-line Seyfert 1 Galaxies
• MOJAVE XII: Acceleration and Collimation of Blazar Jets on Parsec Scales
• On the jet properties of the gamma-ray loud active galactic nuclei
• On the Spectral Break in the Fermi-LAT Spectrum of 3C 454.3
• Correlation Analysis of a Large Sample of Narrow-Line Seyfert 1 Galaxies: Linking Central Engine and Host Properties
• Fermi Large Area Telescope Detection of Bright Gamma-ray Outbursts from a Peculiar Quasar 4C +21.35
• Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
• The high-Eddington NLS1 Ark 564 has the coolest corona
• Optical emission line properties of Narrow Line Seyfert 1s and comparison AGN
• Radio jet emission from GeV-emitting narrow-line Seyfert 1 galaxies
• The Outburst of the Blazar AO 0235+164 in 2006 December: Shock-in-Jet Interpretation
• Orientation dependency of broad-line widths in quasars and consequences for black-hole mass estimation
• An X-Ray View of the Jet-Cycle in the Radio Loud AGN 3C120
• Supermassive black holes, pseudobulges, and the narrow-line Seyfert 1 galaxies
• A Bar Fuels a Super-Massive Black Hole?: Host Galaxies of Narrow-Line Seyfert 1 Galaxies
• General Physical Properties of CGRaBS Blazars
• The first gamma-ray outburst of a Narrow-Line Seyfert 1 Galaxy: the case of PMN J0948+0022 in July 2010
• Intranight optical variability of Blazars
• Flaring from the supermassive black hole in Mrk 335 studied with Swift and NuSTAR
• The Peculiar Radio-Loud Narrow Line Seyfert 1 Galaxy 1H 0323+342
• A Very Radio-Loud Narrow-Line Seyfert 1: PKS 2004-447
• The shape of broad-line profiles in AGN
• Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry
• Gamma-ray blazars near equipartition and the origin of the GeV spectral break in 3C 454.3
• The spectral energy distribution of PKS 2004-447: a compact steep-spectrum source and possible radio-loud narrow-line Seyfert 1 galaxy
• XMM-Newton spectral properties of the Narrow-Line Seyfert 1 galaxy IRAS 13224--3809
• Rapid Infrared Variability of Three Radio-loud Narrow-line Seyfert 1 Galaxies: A View from the Wide-field Infrared Survey Explorer
• An investigation of the origin of soft X-ray excess emission from Narrow-line Seyfert 1 galaxies Akn564 and Mrk1044
• Parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
• The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales
• A blurred reflection interpretation for the intermediate flux state in Mrk 335
• Optical Variability of Narrow and Broad line Seyfert 1 galaxies
• The environments of luminous radio galaxies and type-2 quasars
• The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
• The host-galaxy of the gamma-ray Narrow-line Seyfert 1 galaxy 1H~0323+342
• Gamma-ray Emitting Narrow Line Seyfert 1 Galaxies in The Sloan Digital Sky Survey
• Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
• The physical properties of Fermi BL Lac objects jets
• Identification of a New $\gamma$-ray-emitting narrow-line Seyfert 1 Galaxy, at Redshift $\sim 1$
• Intranight optical variability of γ-ray loud Narrow Line Seyfert 1 galaxies
• General Physical Properties of Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies
• Kiloparsec-scale jets in three radio-loud narrow-line Seyfert 1 galaxies
• Radio-to-gamma-ray Monitoring of the Narrow-Line Seyfert 1 Galaxy PMN J0948+0022 from 2008 to 2011
• The most powerful flaring activity from the NLSy1 PMN J0948+0022
• Detection of Polarimetric Variations Associated with the Shortest Time-Scale Variability in S5 0716$+$714
• Optical Properties of Radio-selected Narrow Line Seyfert 1 Galaxies
• Can the soft excess in AGN originate from disc reflection?
• Violent Intranight Optical Variability of a Radio-Loud Narrow-Line Seyfert 1 Galaxy: SDSS J094857.3+002225
• Investigating kpc-scale radio emission properties of narrow-line Seyfert 1 galaxies
• An orientation-based unification of young jetted AGN: the case of 3C 286
• [O III] line properties in two samples of radio-emitting narrow-line Seyfert 1 galaxies
• Probing narrow-line Seyfert 1 galaxies in the southern hemisphere
• 37 GHz observations of narrow-line Seyfert 1 galaxies
• Violent Hard X-ray Variability of Mrk 421 Observed by NuSTAR in 2013 April
• Fermi-Large Area Telescope Observations of the Exceptional Gamma-ray Flare from 3C 279 in 2015 June
• Global e-VLBI observations of the gamma-ray narrow line Seyfert 1 PMN J0948+0022
• 3C 273 with NuSTAR: Unveiling the AGN
• Uncovering the host galaxy of the $\gamma$-ray-emitting narrow-line Seyfert 1 galaxy FBQS J1644+2619
• Blazar nuclei in radio-loud narrow-line Seyfert 1?
• Near-infrared morphologies of the host galaxies of narrow-line Seyfert 1 galaxies
• On the black hole mass of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• Investigating powerful jets in radio-loud Narrow Line Seyfert 1s
• Jet Properties of GeV-Selected Radio-Loud Narrow-Line Seyfert 1 Galaxies and Possible Connection to Their Disk and Corona
• Large-scale environments of narrow-line Seyfert 1 galaxies
• Discovery of a pseudobulge galaxy launching powerful relativistic jets
• The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View
• The Nature of gamma-ray Loud Narrow Line Seyfert I Galaxies PKS 1502+036 and PKS 2004-447
• XMM-Newton observations of 3C 273
• The relativistic jet of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• The Fate of Young Radio Galaxies: Decelerations Inside Host Galaxies?
• Optical spectroscopic survey of a sample of Unidentified Fermi objects: II
• Multi-Epoch VLBA Imaging of Twenty New TeV Blazars: Apparent Jet Speeds
• Short-Term Radio Variability and Parsec-Scale Structure in a Gamma-Ray Narrow-Line Seyfert 1 Galaxy 1H 0323+342
• Broadband spectral study of the jet-disc emission in the radio-loud narrow-line Seyfert 1 galaxy 1H 0323+342
• 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
• Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array
• Optical variability properties of high luminosity AGN classes
• Minute-Scale Rapid Variability of Optical Polarization in Narrow-Line Seyfert 1 Galaxy: PMN J0948+0022
• Blue outliers among intermediate redshift quasars
• Location of Weak CSS Sources on the Evolutionary Path of Radio-loud AGN
• Connections between galaxy mergers and Starburst: evidence from local Universe
• A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239
• The interacting late-type host galaxy of the radio-loud narrow-line Seyfert 1 IRAS 20181-2244
• Radio Properties of NLS1s
• Intra-night optical variability characteristics of different classes of narrow line Seyfert 1 galaxies
• Kiloparsec-scale emission in the narrow-line Seyfert 1 galaxy Mrk 783
• The host galaxy of the gamma-ray-emitting narrow-line Seyfert 1 galaxy PKS 1502+036
• Extreme Gaseous Outflows in Radio-Loud Narrow-Line Seyfert 1 Galaxies
• Inner jet kinematics and the viewing angle towards the γ-ray narrow-line Seyfert 1 galaxy 1H 0323+342
• The host galaxies of active galactic nuclei with powerful relativistic jets
• Evidence for a population of beamed radio intermediate quasars
• Broadband Observations of the Gamma-ray Emitting Narrow Line Seyfert 1 Galaxy SBS 0846+513
• Disk-Jet Connection in Active Supermassive Black Holes in the Standard Accretion Disk Regime
• Fermi Monitoring of Radio-loud Narrow Line Seyfert 1 Galaxies
• The First GeV Outburst of the Radio-loud Narrow Line Seyfert 1 galaxy PKS 1502+036
• Rare finding of a 100 kpc large double-lobed radio galaxy hosted in the Narrow Line Seyfert 1 galaxy SDSS J103024.95+551622.7
• The Extreme Optical Variability of J0948+0022
• Intra-Night Optical monitoring of three γ-ray detected Narrow-line Seyfert 1 galaxies
• SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
• Intra-Night Optical Variability Monitoring of Fermi Blazars: First Results from 1.3 m J C Bhattacharya Telescope
• Detection of a gamma-ray flare from the high-redshift blazar DA 193
• The XMM-Newton view of the radio loud narrow line Seyfert1 galaxy PMN J0948+0022
• $Fermi$-LAT detection of a transient $\gamma$-ray source in the direction of a distant blazar B3 1428+422 at $z=4.72$
• Independent Black Hole Mass Estimation for the γ-ray Detected Archetypal Narrow-Line Seyfert 1 Galaxy 1H 0323+342 from X-ray Variability
• FBQS J1644+2619: multiwavelength properties and its place in the class of gamma-ray emitting Narrow Line Seyfert 1s
• Similarity of Jet Radiation between Flat Spectrum Radio Quasars and GeV Narrow-Line Seyfert 1 Galaxies: A Universal $\delta$-$L_{\mathrm{c}}$ Correlation
• Optical polarisation variability of radio loud narrow line Seyfert 1 galaxies. Search for long rotations of the polarisation plane

Cited by in corpus (7)

• The first GeV flare of the radio-loud narrow-line Seyfert 1 galaxy PKS 2004-447
• The radio structure of the $\gamma$-ray narrow-line Seyfert 1 galaxy SDSS J211852.96$-$073227.5
• Superluminal Motion and Jet Parameters in the Gamma-ray-Emitting Narrow-Line Seyfert 1 Galaxy TXS 1206+549
• Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
• Non-thermal emission from fall-back clouds in the Broad-Line Region of Active Galactic Nuclei
• Evidence of jet induced optical microvariability in radio-loud Narrow Line Seyfert 1 Galaxies
• Intra-night optical variability study of a non-jetted narrow-line Seyfert 1 galaxy: SDSS J163401.94+480940.1