WISE view of Narrow-Line Seyfert 1 galaxies: mid-infrared color and variability

Abstract

We present the color and flux variability analysis at 3.4 μm (W1-band) and 4.6 μm (W 2-band) of 492 narrow-line Seyfert 1 (NLSy1) galaxies using archival data from the Wide-field Infrared Survey Explorer (WISE). In the WISE color-color, (W1 - W2) versus (W2 - W3) diagram, ~58% of the NLSy1 galaxies of our sample lie in the region occupied by the blazar category of active galactic nuclei (AGN). The mean W1 - W2 color of candidate variable NLSy1 galaxies is $0.99\pm 0.18$ mag. The average amplitude of variability is $0.11\pm 0.07$ mag in long-term (multi-year) with no difference in variability between W1 and W2-bands. The W1 - W2 color of NLSy1 galaxies is anti-correlated with the relative strength of [O III] to Hβ, strongly correlated with continuum luminosity, black hole mass, and Eddington ratio. The long-term amplitude of variability shows weak anti-correlation with the Fe II strength, continuum luminosity and Eddington ratio. A positive correlation between color as well as the amplitude of variability with the radio power at 1.4 GHz was found for the radio-detected NLSy1 galaxies. This suggests non-thermal synchrotron contribution to the mid-infrared color and flux variability in radio-detected NLSy1 galaxies.

arXiv comment10 pages; Accepted for publication in MNRAS

References in corpus (44)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• First Results from the Catalina Real-time Transient Survey
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• Initial Performance of the NEOWISE Reactivation Mission
• Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk
• The Ensemble Photometric Variability of ~25000 Quasars in the Sloan Digital Sky Survey
• Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
• 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
• Long-term optical variability properties of the Palomar-Green quasars
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: I. Observations and Time Series Analysis
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• Discovery of 21 New Changing-look AGNs in Northern Sky
• Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022
• A Complete Sample of Soft X-ray Selected AGN: II. Statistical Analysis
• Black hole mass estimate for a sample of radio-loud narrow-line Seyfert 1 galaxies
• Identification of the infrared non-thermal emission in Blazars
• A Catalog of Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Data Release 12
• The WISE gamma-ray strip parametrization: the nature of the gamma-ray Active Galactic Nuclei of Uncertain type
• The Variability of Quasars. II. Frequency Dependence
• Correlation Analysis of a Large Sample of Narrow-Line Seyfert 1 Galaxies: Linking Central Engine and Host Properties
• Spectral variability of quasars from multi-epoch photometric data in the Sloan Digital Sky Survey Stripe 82
• Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry
• What Powered the Optical Transient AT2017gfo Associated with GW170817?
• Rapid Infrared Variability of Three Radio-loud Narrow-line Seyfert 1 Galaxies: A View from the Wide-field Infrared Survey Explorer
• Optical Variability of Narrow and Broad line Seyfert 1 galaxies
• The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
• VLBI observations of the most radio-loud, narrow-line quasar SDSS J094857.3+002225
• Gamma-ray Emitting Narrow Line Seyfert 1 Galaxies in The Sloan Digital Sky Survey
• Intranight optical variability of γ-ray loud Narrow Line Seyfert 1 galaxies
• Violent Intranight Optical Variability of a Radio-Loud Narrow-Line Seyfert 1 Galaxy: SDSS J094857.3+002225
• Quasar Variability in the Mid-Infrared
• The Nature of gamma-ray Loud Narrow Line Seyfert I Galaxies PKS 1502+036 and PKS 2004-447
• Differential interferometry of QSO broad line regions I: improving the reverberation mapping model fits and black hole mass estimates
• Intra-night optical variability characteristics of different classes of narrow line Seyfert 1 galaxies
• Flux and polarization variability of OJ 287 during early 2016 outburst
• Determination of the size of the dust torus in H0507+164 through optical and infrared monitoring
• The Extreme Optical Variability of J0948+0022
• Exploring the Variable Sky with the Sloan Digital Sky Survey

Cited by in corpus (16)

• A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. Physical Properties derived from the SED Fitting with Optical, Infrared, and Radio Data
• WISE view of changing-look AGNs: evidence for a transitional stage of AGNs
• SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
• A Low Incidence of Mid-Infrared Variability in Dwarf Galaxies
• Are Narrow Line Seyfert 1 Galaxies powered by low mass black holes?
• Mid-infrared Variability of gamma-ray emitting blazars
• TXS 1206+549: a new $\gamma$-ray detected narrow-line Seyfert 1 galaxy at redshift 1.34?
• High-redshift Narrow-line Seyfert 1 Galaxies: A Candidate Sample
• The JCMT Transient Survey: Single Epoch Transients and Variability of Faint Sources
• The mid-infrared variability of the SDSS optical quasars
• Brightness and colour variability in NLSy1s
• The Variability of the Narrow-line Seyfert 1 Galaxies from the PanSTARRS's View
• The comparison of optical variability of broad-line Seyfert 1 and narrow-line Seyfert 1 galaxies from the view of Pan-STARRS
• The rare extended radio-loud narrow-line Seyfert 1 galaxy SDSS J1030+5516 at high resolution
• The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release 10 to 12
• Long-term Mid-infrared Color Variations of Narrow-Line Seyfert 1 Galaxies