General Physical Properties of Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies

Abstract

We present the results of a detailed multi-wavelength study of a sample of sixteen narrow-line Seyfert 1 (NLSy1) galaxies known in $\gamma$-rays so far. This includes a focused X-ray spectral analysis, to compare them with a more general NLSy1 population, and a broadband spectral energy distribution (SED) modeling considering the leptonic radiative processes to understand their similarity/dissimilarity with blazars. The X-ray spectra of $\gamma$-NLSy1 galaxies exhibit similarities both with typical NLSy1 sources below $\lesssim$2 keV and blazars at higher energies. We also find weak evidences of excess absorption in the soft X-ray spectra of 3 sources and a tentative detection of Fe line in 1H~0323+342. A comparison of the broadband parameters derived from the SED modeling reveals the similarity of $\gamma$-NLSy1 objects with blazars, in particular more with flat spectrum radio quasars. The $\gamma$-NLS1 galaxies host relatively low power jets with small bulk Lorentz factors with respect to blazars and this explains the paucity of such sources in the $\gamma$-ray catalogs and identification of an even fewer parent population members. Many of the observed features of these intriguing objects suggest they host low-mass black holes. The accretion rate in Eddington units can be considered as the driving factor to explain the physical properties of $\gamma$-NLSy1 sources, similar to that which is known for general blazar population.

34 pages, 11 figures, 8 tables, to appear in the Astrophysical journal

References in corpus (33)

• A Catalog of Quasar Properties from SDSS DR7
• An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
• Radio-Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications
• The power of blazar jets
• Radio-loud Narrow-Line Type 1 Quasars
• A Population of Radio-loud Narrow Line Seyfert 1 Galaxies with Blazar-like Properties?
• CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
• The effect of radiation pressure on virial black hole mass estimates and the case of Narrow Line Seyfert 1 galaxies
• Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of Flat Spectrum Radio Quasars
• A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410
• 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
• Properties of AGN coronae in the NuSTAR era II: hybrid plasma
• On the two main classes of Active Galactic Nuclei
• General Physical Properties of CGRaBS Blazars
• The Peculiar Radio-Loud Narrow Line Seyfert 1 Galaxy 1H 0323+342
• The spectral energy distribution of PKS 2004-447: a compact steep-spectrum source and possible radio-loud narrow-line Seyfert 1 galaxy
• Parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
• Optical Variability of Narrow and Broad line Seyfert 1 galaxies
• Gamma-ray Emitting Narrow Line Seyfert 1 Galaxies in The Sloan Digital Sky Survey
• Kiloparsec-scale jets in three radio-loud narrow-line Seyfert 1 galaxies
• The power and production efficiency of blazar jets
• Violent Intranight Optical Variability of a Radio-Loud Narrow-Line Seyfert 1 Galaxy: SDSS J094857.3+002225
• First NuSTAR observations of the BL Lac - type blazar PKS~2155-304: constraints on the jet content and distribution of radiating particles
• Jet Properties of GeV-Selected Radio-Loud Narrow-Line Seyfert 1 Galaxies and Possible Connection to Their Disk and Corona
• The relativistic jet of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• What sparks the radio-loud phase of nearby quasars?
• Fermi Monitoring of Radio-loud Narrow Line Seyfert 1 Galaxies
• Evidence for higher black hole spin in radio-loud quasars
• Variable optical polarization during high state in gamma-ray loud narrow line Seyfert 1 galaxy 1H 0323+342
• Multiple Wavelength Variability and Quasi-Periodic Oscillation of PMN J0948+0022
• Similarity of Jet Radiation between Flat Spectrum Radio Quasars and GeV Narrow-Line Seyfert 1 Galaxies: A Universal $\delta$-$L_{\mathrm{c}}$ Correlation
• Modeling the spectral-energy-distribution of 3C 454.3 in a "flat" broad-line-region scenario

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• Jet Power of Jetted Active Galactic Nuclei: Implication for Evolution and Unification
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• Using High-Energy Neutrinos As Cosmic Magnetometers
• Jetted narrow-line Seyfert 1 galaxies breaking the jet paradigm -- a comprehensive study of host galaxy morphologies
• TXS 2116$-$077: A Gamma-ray Emitting Relativistic Jet Hosted in a Galaxy Merger
• The Close AGN Reference Survey (CARS): Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044
• The first GeV flare of the radio-loud narrow-line Seyfert 1 galaxy PKS 2004-447
• TXS 1206+549: a new $\gamma$-ray detected narrow-line Seyfert 1 galaxy at redshift 1.34?
• Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies
• The relativistic jet of the $\gamma$-ray emitting narrow-line Seyfert 1 galaxy PKS J1222$+$0413
• High-redshift Narrow-line Seyfert 1 Galaxies: A Candidate Sample
• From the Fermi blazar sequence to the relation between Fermi blazars and gamma-ray Narrow-line Seyfert 1 Galaxies
• Modelling the variable emission states of $\gamma$-ray emitting Narrow-Line Seyfert 1 galaxies
• The mid-infrared variability of the SDSS optical quasars
• The radio structure of the $\gamma$-ray narrow-line Seyfert 1 galaxy SDSS J211852.96$-$073227.5
• An optical perspective on early-stage AGN with extreme radio flares
• On the Hadronic Origin of High Energy Emission of $\gamma$-ray Loud Narrow-Line Seyfert 1 PKS 1502+036
• Radio signals from early direct collapse black holes
• On the Unified View of Extragalactic Sources based on their Broadband Emission Properties
• Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
• Investigating possible unification of Seyfert galaxies and blazars in Fermi-LAT sample
• 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
• The Origin of X-ray Emission in the Gamma-ray emitting Narrow-Line Seyfert 1 1H 0323+342