A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
arXiv:2112.09150 · doi:10.1093/mnras/stab3700
Abstract
We present a comparative study of the physical properties of a homogeneous sample of 144 Narrow line Seyfert 1 (NLSy1) and 117 Broad-line Seyfert 1 (BLSy1) galaxies. These two samples are in a similar luminosity and redshift range and have optical spectra available in the 16 data release of Sloan Digital Sky Survey (SDSS-DR16) and X-ray spectra in either XMM-NEWTON or ROSAT. Direct correlation analysis and a Principal Component Analysis (PCA) have been performed using ten observational and physical parameters obtained by fitting the optical spectra and the soft X-ray photon indices as another parameter. We confirm that the established correlations for the general quasar population hold for both types of galaxies in this sample despite significant differences in the physical properties. We characterize the sample also using the line shape parameters, namely the asymmetry and kurtosis indices. We find that the fraction of NLSy1 galaxies showing outflow signatures, characterized by blue asymmetries, is higher by a factor of about 3 compared to the corresponding fraction in BLSy1 galaxies. The presence of high iron content in the broad-line region of NLSy1 galaxies in conjunction with higher Eddington ratios can be the possible reason behind this phenomenon. We also explore the possibility of using asymmetry in the emission lines as a tracer of outflows in the inner regions of Active Galactic Nuclei. The PCA results point to the NLSy1 and BLSy1 galaxies occupying different parameter spaces, which challenges the notion that NLSy1 galaxies are a subclass of BLSy1 galaxies.
arXiv comment15 pages, 11 figures, Accepted for publication in MNRAS
References in corpus (69)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- The Sloan Digital Sky Survey: Technical Summary
- The Seventh Data Release of the Sloan Digital Sky Survey
- Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
- 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
- Revisiting the Unified Model of Active Galactic Nuclei
- The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements II. The Full Sample of Reverberation-Mapped AGNs
- The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release
- Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
- Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
- The diversity of quasars unified by accretion and orientation
- The AGN Black Hole Mass Database
- A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
- Eigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei
- Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale
- Active Galactic Nuclei in the Sloan Digital Sky Survey: I. Sample Selection
- Reverberation Mapping Results for Five Seyfert 1 Galaxies
- The Lick AGN Monitoring Project: Reverberation Mapping of Optical Hydrogen and Helium Recombination Lines
- Analysis of optical Fe II emission in a sample of AGN spectra
- A Complete Sample of Soft X-ray Selected AGN: II. Statistical Analysis
- Distributions of Galaxy Spectral Types in the Sloan Digital Sky Survey
- Broad-line Balmer Decrements in Blue Active Galactic Nuclei
- The Structure of the Broad Line Region in AGN: I. Reconstructed Velocity-Delay Maps
- Space Telescope and Optical Reverberation Mapping Project. I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope
- A Catalog of Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Data Release 12
- Dust inflated accretion disc as the origin of the Broad Line Region in Active Galactic Nuclei
- Detailed Characterization of H_beta emission line profile in low z SDSS quasars
- 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
- The Profiles of H-Beta and [OIII] 5007 in Radio-Loud Quasars
- Are the black hole masses in Narrow Line Seyfert 1 galaxies actually small?
- Modeling reverberation mapping data I: improved geometric and dynamical models and comparison with cross-correlation results
- Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VI. Velocity-resolved Reverberation Mapping of H Line
- A spectroscopic analysis of a sample of narrow-line Seyfert 1 galaxies selected from the Sloan Digital Sky Survey
- Reverberation Mapping of Luminous Quasars at High-z
- The Quasar Main Sequence explained by the combination of Eddington ratio, metallicity and orientation
- Correlation Analysis of a Large Sample of Narrow-Line Seyfert 1 Galaxies: Linking Central Engine and Host Properties
- The spatially resolved broad line region of IRAS 09149-6206
- Line Shifts, Broad-Line Region Inflow, and the Feeding of AGNs
- The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
- Monitoring AGNs with Hβ Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping
- A Combined Optical and X-ray Study of Unobscured Type 1 AGN. II. Relation Between X-ray Emission and Optical Spectra
- Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
- The Fe II problem in NLS1s
- Bayesian AGN Decomposition Analysis for SDSS Spectra: A Correlation Analysis of [OIII] Outflow Kinematics with AGN and Host Galaxy Properties
- The Narrow-Line Region of Seyfert Galaxies: Narrow-Line Seyfert 1 Galaxies versus Broad-Line Seyfert 1 Galaxies
- What does Civλ1549 tell us about the physical driver of the Eigenvector Quasar Sequence?
- The Sloan Digital Sky Survey Reverberation Mapping Project: Low-Ionization Broad-Line Widths and Implications for Virial Black Hole Mass Estimation
- Highly accreting quasars: The SDSS low-redshift catalog
- Stratified disc wind models for the AGN broad-line region: ultraviolet, optical and X-ray properties
- Investigating kpc-scale radio emission properties of narrow-line Seyfert 1 galaxies
- [O III] line properties in two samples of radio-emitting narrow-line Seyfert 1 galaxies
- A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties
- Reverberation Mapping of Active Galactic Nuclei
- Radio-loudness along the quasar main sequence
- Statistical multifrequency study of narrow-line Seyfert 1 galaxies
- A comparison of hard X-ray photon indices and iron \ka emission lines in X-ray luminous narrow- and broad-line Seyfert 1 galaxies
- A High-Quality velocity-delay map of the broad-line region in NGC 5548
- New Insights Into The Narrow-Line Seyfert 1 Phenomenon
- Exploring the Diversity of Type 1 Active Galactic Nuclei Identified in SDSS-IV/SPIDERS
- Comparing Hbeta Line Profiles in the 4D Eigenvector 1 Context
- An extended size-luminosity relation for the reverberation-mapped AGNs: the role of the accretion rate
- A comparison of X-ray photon indices among the narrow and broad-line Seyfert 1 galaxies
- A Look at What Is (and Isn't) Known About Quasar Broad Line Regions and How Narrow-Line Seyfert 1 Galaxies Fit In
- The case for inflow of the broad-line region of active galactic nuclei
- Probing spectral properties of radio-quiet quasars searched for optical microvariability
- Intra-night optical variability of ray detected narrow-line Seyfert 1 galaxies
- Properties of radio-loud quasars in Sloan Digital Sky Survey