The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei

Abstract

We reinvestigate the relationship between the characteristic broad-line region size (R_blr) and the Balmer emission-line, X-ray, UV, and optical continuum luminosities. Our study makes use of the best available determinations of R_blr for a large number of active galactic nuclei (AGNs) from Peterson et al. Using their determinations of R_blr for a large sample of AGNs and two different regression methods, we investigate the robustness of our correlation results as a function of data sub-sample and regression technique. Though small systematic differences were found depending on the method of analysis, our results are generally consistent. Assuming a power-law relation R_blr \propto L^α, we find the mean best-fitting αis about 0.67+/-0.05 for the optical continuum and the broad Hβluminosity, about 0.56+/-0.05 for the UV continuum luminosity, and about 0.70+/-0.14 for the X-ray luminosity. We also find an intrinsic scatter of about 40% in these relations. The disagreement of our results with the theoretical expected slope of 0.5 indicates that the simple assumption of all AGNs having on average same ionization parameter, BLR density, column density, and ionizing spectral energy distribution, is not valid and there is likely some evolution of a few of these characteristics along the luminosity scale.

11 pages, 2 figures, emulateapj, accepted for publication in The Astrophysical Journal

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• The Ionized Absorber and Nuclear Environment of IRAS 13349+2438: Multi-wavelength insights from coordinated Chandra HETGS, HST STIS, HET, and Spitzer IRS
• Constraints on the broad line region from regularized linear inversion: Velocity-delay maps for five nearby active galactic nuclei
• Broad-line region structure and kinematics in the radio galaxy 3C 120
• The evolution of host mass and black hole mass in QSOs from the 2dF QSO Redshift Survey
• The Sloan Digital Sky Survey Reverberation Mapping Project: Comparison of Lag Measurement Methods with Simulated Observations
• Extended X-ray Emission in the HI Cavity of NGC 4151: Galaxy-scale AGN Feedback?
• Current and future applications of Reverberation-mapped quasars in Cosmology
• A comparative study of optical/ultraviolet variability of narrow-line Seyfert 1 and broad-line Seyfert 1 active galactic nuclei
• Calibration of the virial factor $f$ in supermassive black hole masses of reverberation-mapped AGNs
• CIV and CIII] reverberation mapping of the luminous quasar PG 1247+267
• The Spectral Energy Distribution of the High-Z Blazar Q0906+693
• A Non-parametric Approach to Constrain the Transfer Function in Reverberation Mapping
• Polarization of the changing-look quasar J1011+5442
• Gamma rays from Fast Black-Hole Winds
• Emission Signatures from Sub-parsec Binary Supermassive Black Holes I: Diagnostic Power of Broad Emission Lines
• The HST view of the broad line region in low luminosity AGN
• Line and continuum variability of two intermediate-redshift, high-luminosity quasars
• The Black Hole Mass - Stellar Velocity Dispersion Relationship for Quasars in the Sloan Digital Sky Survey Data Release 7
• Optical and radio properties of giant radio quasars: Central black hole characteristics
• Is BL Lacertae an "orphan" AGN? Multiband and spectroscopic constraints on the parent population
• Constraining the dynamical importance of hot gas and radiation pressure in quasar outflows using emission line ratios
• Can we improve CIV-based single epoch black hole mass estimations?
• Synchrotron and inverse-Compton emission from blazar jets - III. Compton-dominant blazars
• MgII Line Variability of High Luminosity Quasars
• Black hole masses and starbursts in X-shaped radio sources
• Understanding AGN-Host Connection in Partially Obscured Active Galactic Nuclei. Part I: The Nature of AGN+HII Composites
• Microlensing of a Biconical Broad Line Region
• Application of the Disk Evaporation Model to AGNs
• Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years
• The case for primordial black holes as dark matter
• Obscured GOODS AGN and Their Host Galaxies at z < 1.25: The Slow Black Hole Growth Phase
• A High Resolution View of the Warm Absorber in the Quasar MR2251-178
• Spectral Variability of Quasars in the Sloan Digital Sky Survey. II: The C IV Line
• A comparative analysis of virial black-hole mass estimates of moderate-luminosity active galactic nuclei using Subaru/FMOS
• Imprints of the Janis-Newman-Winicour spacetime on observations related to shadow and accretion
• Two New "Turn-off" Changing-look Active Galactic nuclei and Implication on "Partially Obscured" AGNs
• Is the Broad-Line Region Clumped or Smooth? Constraints from the H alpha Profile in NGC 4395, the Least Luminous Seyfert 1 Galaxy
• The Compact Structure of Radio-Loud Broad Absorption Line Quasars
• Integral Field Spectroscopy of the Quadruply Lensed Quasar 1RXS J1131-1231: New Light on Lens Substructures
• Probing the circumnuclear absorbing medium of the buried AGN in NGC 1068 through NuSTAR observations
• A quasar-galaxy merger at $z\sim 6.2$: black hole mass and quasar properties from the NIRSpec spectrum
• Quasar Cartography: from Black Hole to Broad Line Region Scales
• A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239
• The dust-eliminated shape of quasar spectra in the near-infrared: a hidden part of the big blue bump
• Possible Origin of Radio Emission from Nonthermal Electrons in Hot Accretion Flows for Low-Luminosity Active Galactic Nuclei
• Decoding signatures of extra dimensions and estimating spin of quasars from the continuum spectrum
• Accretion Properties of A Sample of Hard X-ray (<60keV) Selected Seyfert 1 Galaxies
• Balmer Emission Line Profiles and the Complex Properties of Broad Line Regions in Active Galactic Nuclei
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. III. Optical Variability and X-ray/UV/Optical Correlations
• Masses and Accretion Rates of Supermassive Black Holes in Active Galactic Nuclei from the INTEGRAL Survey
• The Quasar SDSS J153636.22+044127.0: A Double-Peaked Emitter in a Candidate Binary Black-Hole System
• SDSS-IV/SPIDERS: A Catalogue of X-Ray Selected AGN Properties; Spectral Properties and Black Hole Mass Estimates for SPIDERS SDSS DR14 Type 1 AGN
• Black hole mass measurement using ALMA observations of [CI] and CO emissions in the Seyfert 1 galaxy NGC7469
• Fast Inflow Directly Feeding Black Hole Accretion Disk in Quasars
• The host galaxy of a narrow-line Seyfert 1 galaxy RE J1034+396 with X-ray quasi-periodic oscillations
• Chemical evolution of the Universe at 0.7 < z < 1.6 derived from abundance diagnostics of the broad-line region of quasars
• Ultraviolet Continuum Color Variability of Luminous Sloan Digital Sky Survey QSOs
• Exploring X-ray and radio emission of type 1 AGN up to z ~ 2.3
• The peculiar emission line spectra of core-Extremely Red BOSS Quasars at $z\sim$2-3: orientation and/or evolution?
• SDSS J1130+0058 an X-shaped Radio Source With Double-Peaked Low-Ionization Emission Lines: A binary Black Hole System?
• Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?
• The Dusty Heart of NGC 4151 Revealed by $\lambda \sim$1-40 $\mu$m Reverberation Mapping and Variability: A Challenge to Current Clumpy Torus Models
• An ultra-dense fast outflow in a quasar at z=2.4
• The relativistic jet and its central engine of $Fermi$ blazars
• The host galaxy of the gamma-ray-emitting narrow-line Seyfert 1 galaxy PKS 1502+036
• Observing Supermassive Black Holes across cosmic time: from phenomenology to physics
• Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3
• What controls the UV-to-X-ray continuum shape in quasars?
• Multiwavelength variability study and search for periodicity of PKS 1510-089
• Discovery of Extremely Broad Balmer Absorption Lines in SDSS J152350.42+391405.2
• A deep X-ray view of the bare AGN Ark 120. I. Revealing the Soft X-ray Line Emission
• Exploring the Diversity of Type 1 Active Galactic Nuclei Identified in SDSS-IV/SPIDERS
• Do reverberation-measured H$\beta$ quasars provide a useful test of cosmology?
• Ultraviolet Emission-Line Correlations in Hubble/COS Spectra of Active Galactic Nuclei: Single-Epoch Black Hole Masses
• The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
• VLBI Imaging of the Double Peaked Emission Line Seyfert KISSR1494
• Black-hole mass estimates for a homogeneous sample of bright flat-spectrum radio quasars
• Radio Emission from Outflow-Cloud Interaction and Its Constraint on TDE Outflow
• A Wide Area Survey for High-redshift Massive Galaxies. II. Near-infrared Spectroscopy of BzK-selected Massive Star-forming Galaxies
• A Correlation Between the Ionization State of the Inner Accretion Disk and the Eddington Ratio of Active Galactic Nuclei
• Constraining the quasar population with the broad-line width distribution
• Stronger Constraints on the Evolution of the $M_{\mathrm{BH}}-{\sigma }_{\ast }$ Relation up to $z\sim 0.6$
• The first 62 AGN observed with SDSS-IV MaNGA - IV: gas excitation and star-formation rate distributions
• Quasars and their emission lines as cosmological probes
• Do Reverberation Mapping Analyses Provide an Accurate Picture of the Broad Line Region?
• A Study of Outflows in Luminous Quasars at Redshift $\sim 0.4-0.8$
• A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
• Unusual Double-peaked Emission in the SDSS Quasar J093201.60+031858.7
• Revealing the Broad Line Region of NGC 1275: The Relationship to Jet Power
• The optical spectrum of PKS 1222+216 and its black hole mass
• Modelling blazar flaring using a time-dependent fluid jet emission model - an explanation for orphan flares and radio lags
• NuSTAR Observations of AGN with Low Observed X-ray to [OIII] Luminosity Ratios: Heavily Obscured AGN or Turned-Off AGN?
• The Accretion Geometry in Radio-Loud Active Galaxies
• Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• The near-infrared radius-luminosity relationship for active galactic nuclei
• Are High-Redshift Quasars Blurry?
• A ghostly damped Ly$\alpha$ system revealed by metal absorption lines
• Photoionization-driven Absorption Lines Variability in Balmer Absorption Line Quasar LBQS 1206+1052
• The reverberation signatures of rotating disc winds in active galactic nuclei
• Implications of Einstein-Maxwell dilaton-axion gravity from the black hole continuum spectrum
• Spectral features of tidal-disruption candidates and alternative origins for such transient flares
• An extended size-luminosity relation for the reverberation-mapped AGNs: the role of the accretion rate
• The long-term centimeter variability of active galactic nuclei: A new relation between variability timescale and accretion rate
• High-frequency excess in the radio continuum spectrum of the type-1 Seyfert galaxy NGC 985
• Variability of Moderate Luminosity Active Galactic Nuclei at z=0.36
• The estimate of emission region locations of {\it Fermi} FSRQs
• A multiwavelength-motivated X-ray model for the Circinus Galaxy
• Biases in the Quasar Mass-Luminosity Plane
• Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4
• On the relation between hard X-ray photon index versus accretion rate for super-Eddington accreting quasars
• Host Galaxies of z=4 Quasars
• Three QSOs acting as strong gravitational lenses
• Testing Super-Eddington Accretion onto a Supermassive Black Hole: Reverberation Mapping of PG 1119+120
• The black hole mass of the $z=2.805$ multiply imaged quasar SDSS J2222+2745 from velocity-resolved time lags of the CIV emission line
• Extended Ly$\alpha$ emission around quasars with eclipsing damped Ly$\alpha$ systems
• Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey
• SDSS J0159 as an outlier in the Mbh-sigma space: further clues to support a central tidal disruption event?
• Suzaku observation of the LINER NGC 4102
• Gamma rays from jets interacting with BLR clouds in blazars
• The variability of optical \feii emission in PG QSO 1700+518
• A new method to obtain the Broad Line Region size of high redshift quasars
• Spatially Resolving the Kinematics of the <100 μas Quasar Broad Line Region using Spectroastrometry
• Evidence that Emission and Absorption Outflows in Quasars Are Related
• Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
• Deficiency of Broad Line AGNs in Compact Groups of Galaxies
• H-AMR FORGE'd in FIRE I: Magnetic state transitions, jet launching and radiative emission in super-Eddington, highly magnetized quasar disks formed from cosmological initial conditions
• Constraining the geometry and kinematics of the quasar broad emission line region using gravitational microlensing. I. Models and simulations
• A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies
• Systematically smaller single-epoch quasar black hole masses using a radius-luminosity relationship corrected for spectral bias
• Multiwavelength campaign on Mrk 509 XV. A global modeling of the broad emission lines in the Optical, UV and X-ray bands
• The Large Array Survey Telescope -- Science Goals
• Dependence of NLRs sizes on [OIII] luminosity in low redshift AGN with double-peaked broad Balmer emission lines
• Measurement of The Broad Line Region Size in a Luminous MACHO Quasar
• The Effect of Variability on the Estimation of Quasar Black Hole Masses
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• The low-metallicity QSO HE 2158-0107: A massive galaxy growing by the accretion of nearly pristine gas from its environment?
• Nicmos Polarimetry of "Polar Scattered" Seyfert 1 Galaxies
• The supermassive black hole masses of reverberation-mapped active galactic nuclei
• An X-ray variable absorber within the Broad Line Region in Fairall 51
• Discovery of Dramatic Optical Variability in SDSS J1100+4421: A Peculiar Radio-Loud Narrow-Line Seyfert 1 Galaxy?
• The outburst of the changing-look AGN IRAS23226-3843 in 2019
• Active Galactic Nuclei with Double-Peaked Balmer Lines: I. Black Hole Masses and the Eddington ratios
• Characterization of a sample of intermediate-type AGN. I. Spectroscopic properties and serendipitous discovery of new Dual AGN
• 3C390.3: More Stable Evidence for Origination of Double-Peaked Broad Balmer Lines from Accretion Disk Near Central Black Hole
• Single-Epoch Black Hole Mass Estimators For Broad-Line Active Galactic Nuclei: Recalibrating Hbeta with A New Approach
• Line profile and continuum variability in the very broad-line Seyfert galaxy Mrk 926
• CO line width and the black hole -- bulge relationship at high redshift
• Virilization of the Broad Line Region in Active Galactic Nuclei - connection between shifts and widths of broad emission lines
• The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at $z\lesssim 1$
• Does black hole continuum spectrum signal f(R) gravity in higher dimensions?
• A coronagraphic absorbing cloud reveals the narrow-line region and extended Lyman-$\alpha$ emission of QSO J0823+0529
• Quasar optical variability: searching for interband time delays
• The changing look of PKS 2149-306
• Estimating supermassive black hole masses in AGNs using polarization of broad MgII, H$\alpha$ and H$\beta$ lines
• Estimators of Bolometric Luminosity and Black Hole Mass with Mid-infrared Continuum Luminosities for Dust-obscured Quasars: Prevalence of Dust-obscured SDSS Quasars
• Nuclear Activity in the Low Metallicity Dwarf Galaxy SDSS J0944-0038: A Glimpse into the Primordial Universe
• Dust Budget Crisis in Little Red Dots
• The optical emission line spectrum of Mark 110
• Kinematics of the Broad Line Region in M81
• Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line
• Multiwavelength analysis and the difference in the behavior of the spectral features during the 2010 and 2014 flaring periods of the blazar 3C 454.3
• The black hole - host galaxy relation for very low-mass quasars
• Radio Properties of Low Redshift Broad Line Active Galactic Nuclei Including Extended Radio Sources
• Galactic Winds across the Gas-Rich Merger Sequence: I. Highly Ionized N V and O VI Outflows in the QUEST Quasars
• Evolution of the Black Hole - Bulge Relationship in QSOs
• The final verdict by XMM-Newton: the X-ray obscured Seyfert galaxy NGC5506 has a broad Fe K-alpha line
• Detecting subparsec super-massive binary black holes: Long termmonitoring perspective
• PKS 2123-463: a confirmed gamma-ray blazar at high redshift
• The size of BLRs of low luminous Active Galactic Nuclei
• Direct Observational Test Rules Out Small MgII Absorbers
• Reverberation Mapping with Intermediate-Band Photometry: Detection of Broad-Line H$\alpha$ Time Lags for Quasars at $0.2<z<0.4$
• Strong Response of the very broad h$\beta$ Emission Line in Luminous Radio-Quite Quasar pg1416-129
• Black hole masses of weak emission line quasars based on continuum fit method
• The missing FeII bump in faint JWST AGN: possible evidence for metal-poor broad-line regions at early cosmic times
• A compact core-jet structure in the changing-look Seyfert NGC 2617
• The effect of the broad-line region with geometrical structures on gamma-ray absorption in blazars
• An Unobscured type II quasar candidate: SDSS J012032.19-005501.9
• Shedding New Light on Weak Emission-Line Quasars in the C${}_{\mathrm{IV}}$-H$\beta$ Parameter Space
• On the Performance of Quasar Reverberation Mapping in the Era of Time-Domain Photometric Surveys
• Predicting the broad lines polarization emitted by supermassive binary black holes
• The microvariability and wavelength dependence of polarization degree/angle of BL Lacertae in the outburst 2020 to 2021
• The Discovery of a Hidden Broad Line AGN in a Bulgeless Galaxy: Keck NIR Spectroscopic Observations of SDSS J085153.64+392611.76
• The Correlation Between Spectral Index And Accretion Rate For AGN
• Polar Dust Emission in Quasar IR SEDs and Its Correlation with Narrow Line Regions
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• Locating positions of γ-ray--emitting regions in blazars
• First case of strong gravitational lensing by a QSO : SDSS J0013+1523 at z = 0.120
• A correlation between the stellar and [Fe II] velocity dispersions in Active Galaxies
• VLT/SINFONI study of black hole growth in high redshift radio-loud quasars from the CARLA survey
• Hidden Broad-line Regions in Seyfert 2 Galaxies: from the spectropolarimetric perspective
• Numerical Study on Outflows in Seyfert Galaxies I: Narrow Line Region Outflows in NGC 4151
• Absorption at the dust sublimation radius and the dichotomy between X-ray and optical classification in the Seyfert galaxy H0557-385
• SDSS J1138+3517: A quasar showing remarkably variable broad absorption lines
• Line shifts and sub-pc super-massive binary black holes
• Getting More Out of Black Hole Superradiance: a Statistically Rigorous Approach to Ultralight Boson Constraints from Black Hole Spin Measurements
• X-ray Absorption and Optical Extinction in the Partially Obscured Seyfert Nucleus in Mrk 1393
• Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
• Investigating the radio-loud phase of broad absorption line quasars
• Discovery of a red quasar with recurrent activity
• The interaction of the active nucleus with the host galaxy interstellar medium
• Measuring time delays: I. Using a flux time series that is a linear combination of time-shifted light curves
• Recoiling Supermassive Black Holes in Spin-flip Radio Galaxies
• The sizes of BLRs and BH masses of double-peaked broad low-ionization emission line objects
• B2 0954+25A: a typical Fermi blazar or a gamma-loud Narrow Line Seyfert 1
• Type 1 Active Galactic Nucleus Fraction in SDSS/FIRST Survey
• Photoionization Modelling of the Giant Broad-Line Region in NGC 3998
• Dependence of the broad Fe K$\alpha$ line on the physical parameters of AGN
• Understanding AGN-host connection in partially obscured active galactic nuclei. Part III: Properties of ROSAT-selected SDSS AGNs
• Physical properties and the variability mechanism of the He I outflow in NGC 4151
• Do all QSOs have the same black hole mass?
• Quasar Main Sequence: a line or a plane?
• A Likely Super Massive Black Hole Revealed by its Einstein Radius in Hubble Frontier Fields Images
• Active Galaxies and the Study of Black Hole Demographics
• Correlation between Line Width and Line Flux of Double-Peaked Broad Halpha of 3C390.3
• Supermassive Black Hole Masses in Type II Active Galactic Nuclei with Polarimetric Broad Emission Lines
• A Direct Linkage Between AGN Outflows in The Narrow-line Regions and The X-ray Emission From The Accretion disks
• Suspended and restored activities of A Nearby Super Massive Black Hole
• Constraining broad-line regions from time lags of broad emission lines relative to radio emission
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Compact radio emission from z~0.2 X-ray bright AGN
• The Collisional and Photoionized Plasma in the Polarized NLS1 galaxy Mrk 1239
• An observational link between AGN Eddington ratio and [NII]λ6583/Ha at 0.6<z<1.7
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• The Size, Structure and Ionization of the Broad Line Region in NGC 3227
• The radio luminosity, black hole mass and Eddington ratio for quasars from the Sloan Digital Sky Survey
• Gemini Near Infrared Spectrograph - Distant Quasar Survey: Prescriptions for Calibrating UV-Based Estimates of Supermassive Black Hole Masses in High-Redshift Quasars
• Complex Optical/UV and X-ray Variability of the Seyfert 1 galaxy 1H 0419-577
• The AGN Hubble Diagram and Its Implications for Cosmology
• Blazar jets launched with similar energy per baryon, independently of their power
• Adaptive Optics: Observations and Prospects for Studies of Active Galactic Nuclei
• In quest of axionic hairs in quasars
• Strong Lensed QSOs with Variability Detectable by LSST: How many are there?
• Modelling the variable emission states of $\gamma$-ray emitting Narrow-Line Seyfert 1 galaxies
• Variability of Broad Emission Lines in High-Luminosity,High-Redshift Quasars
• First black hole mass estimation for the quadruple lensed system WGD2038-4008
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• Determining Quasar Orientation
• More Evidence for the Intermediate Broad Line Region of the Mapped AGN PG 0052+251
• Broad spectral line and continuum variabilities in QSO spectra induced by microlensing of diffusive massive substructure
• Composite reverberation mapping
• High-$z$ Universe probed via Lensing by QSOs (HULQ) I. Number Estimates of QSO-QSO and QSO-Galaxy Lenses
• Inflowing Gas in the Central Parsec of M81
• A hard look at the X-ray spectral variability of NGC 7582
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• AGN mass estimates in large spectroscopic surveys: the effect of host galaxy light
• Quasi-Stellar Objects acting as potential Strong Gravitational Lenses in the SDSS-III BOSS survey
• Galactic Winds across the Gas-Rich Merger Sequence II. Lyman Alpha Emission and Highly Ionized O VI and N V Outflows in Ultraluminous Infrared Galaxies
• Are broad optical balmer lines from central accretion disk in PG 1613+658?
• Photometric reverberation mapping of AGNs at 0.1 < z < 0.8: I. Observational technique
• The Broad Line Region in NGC 4051: An Inflow Illuminated by a 10^5 K Accretion Disk
• Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping
• Multi-epoch properties of the warm absorber in the Seyfert 1 galaxy NGC 985
• Discovery of a Quasar with Double-Peaked Broad Balmer Emission Lines
• Time Variable Broad Line Emission in NGC 4203: Evidence for Stellar Contrails
• Optical spectral index - luminosity relation for the 17 mapped Palomar-Green quasars
• The Co-Evolution of Galaxies and Black Holes: Current Status and Future Prospects
• Unveiling the monster heart: unbeamed properties of blazar 4C 71.07
• A possible bias on the estimate of Lbol/Ledd in AGN as a function of luminosity and redshift
• The Great Slump: Mrk926 reveals discrete and varying Balmer line satellite components during a drastic phase of decline
• Spectral principal component analysis of mid-infrared spectra of a sample of PG QSOs
• Diagnostics of the structure of AGN's broad line regions with reverberation mapping data: confirmation of the two-component broad line region model
• Absorption Variability of the Highly Obscured Active Galactic Nucleus NGC 4507
• Sub-millimeter Detected z~2 Radio-quiet QSOs: Accurate Redshifts, Black Hole Masses, and Inflow/Outflow Velocities
• Signatures of regular black holes from the quasar continuum spectrum
• Spectral Energy Distribution Variations of Nearby Seyfert Galaxies During AGN Watch Monitoring Programs
• Quasar Host Galaxies and the $M_{SMBH}$ - ${\sigma }_{\ast }$ Relation
• A novel approach to study the variability of NGC 5548
• Winds of change: the nuclear and galaxy-scale outflows and the X-ray variability of 2MASS 0918+2117
• Size and kinematics of the CIV broad emission line region from microlensing-induced line profile distortions in two gravitationally lensed quasars
• Understanding the AGN-Host Connection in Broad Mgii Emission Selected AGN-Host Hybrid Qausars
• A Highly Accreting Low-Mass Black Hole Hidden in the Dust: Suzaku and NuSTAR observations of the NLS1 Mrk 1239
• Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
• Searching for Low-Redshift Hot Dust-Obscured Galaxies
• X-ray absorption in Compton-thin AGN: the predictions of a model revisited
• Quasars' Optical Polarization and Balmer Edge Feature Revealed by Ultra-Violet, and Polarized Visible to Near Infrared Emissions
• Effect of a partial coverage of quasar broad-line regions by intervening H${}_2$-bearing clouds
• On the orientation of Narrow Line Seyfert I
• Black Hole masses for 14 gravitational lensed quasars
• Hydrogen Balmer Emission Lines and the Complex Broad Line Region Structure
• Estimating black hole masses of blazars
• Uncertainty Quantification of the Virial Black Hole Mass with Conformal Prediction
• Ultra-dense Broad-line Region Scale Outflow in Highly Reddened Quasar SDSS J145057.28+530007.6
• partly obscured accretion disk model to explain Shifted broad Balmer emission lines of Active Galactic Nuclei
• Strong Optical and UV Intermediate-Width Emission Lines in the Quasar SDSS J232444.80-094600.3: Dust-Free and Intermediate-Density Gas at the Skin of Dusty Torus ?
• Modeling the flaring activity of the high z, hard X-ray selected blazar IGR J22517+2217
• A physical model for radiative, convective dusty disk in AGN
• Obscured Narrow-Line Seyfert 1 Galaxy Candidate Mrk 1388 with Nonthermal Jets
• First Detection of 12CO (1--0) Emission from Two Narrow-Line Seyfert 1 Galaxies
• Spectroscopy of bright quasars: emission lines and internal extinction
• Association of Optical, Ultraviolet and Soft X-ray excess Emissions in AGNs
• Non-detection of Broad Hydrogen Radio Recombination Lines in Circinus Galaxy
• Ultradense Gases beyond Dusty Torus in a Partially Obscured Quasar
• Techniques for Profile Binning and Analysis of Eigenvector Composite Spectra: Comparing Hbeta and MgII 2800 as Virial Estimators
• Giant Broad Line Regions in Dwarf Seyferts
• Feature Selection for Classification of Blazars Based on Optical Photometric and Polarimetric Time-Series Data
• Line Shapes Emitted from Spiral Structures around Symmetric Orbits of Supermassive Binary Black Holes
• Radiation from matter entrainment in astrophysical jets: the AGN case
• The FeK$\alpha$ Compton shoulder in accreting Supermassive Black Holes
• Medium-band photometric reverberation mapping of AGNs at $0.1<z<0.8$. Techniques and sample
• A Near-Infrared look at AGN Feedback in Bulgeless Galaxies
• Accretion/Jet Activity and Narrow [O III] Kinematics in Young Radio Galaxies
• Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies
• The study of the circumnuclear environment of accreting supermassive black holes with realistic X-ray spectral models
• The physical relation between disc and coronal emission in quasars
• Massive black holes and their galaxies
• Physical parameters and classification of eight galactic nuclei from the Second Byurakan Survey
• Quasar continuum spectrum disfavors black holes with a magnetic monopole charge
• Uncertainties of the masses of black holes and Eddington ratios in AGN
• Measuring monster MBHs: maybe mighty, maybe merely massive
• Precision near-IR spectroscopy for understanding AGN physics and shed light on the H0 tension -- SHARP Science Book
• The Narrow-Line Region of Narrow-Line Seyfert 1 Galaxies