The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei

Abstract

We present an updated and revised analysis of the relationship between the Hbeta broad-line region (BLR) radius and the luminosity of the active galactic nucleus (AGN). Specifically, we have carried out two-dimensional surface brightness decompositions of the host galaxies of 9 new AGNs imaged with the Hubble Space Telescope Wide Field Camera 3. The surface brightness decompositions allow us to create "AGN-free" images of the galaxies, from which we measure the starlight contribution to the optical luminosity measured through the ground-based spectroscopic aperture. We also incorporate 20 new reverberation-mapping measurements of the Hbeta time lag, which is assumed to yield the average Hbeta BLR radius. The final sample includes 41 AGNs covering four orders of magnitude in luminosity. The additions and updates incorporated here primarily affect the low-luminosity end of the R-L relationship. The best fit to the relationship using a Bayesian analysis finds a slope of alpha = 0.533 (+0.035/-0.033), consistent with previous work and with simple photoionization arguments. Only two AGNs appear to be outliers from the relationship, but both of them have monitoring light curves that raise doubt regarding the accuracy of their reported time lags. The scatter around the relationship is found to be 0.19(+/-0.02) dex, but would be decreased to 0.13 dex by the removal of these two suspect measurements. A large fraction of the remaining scatter in the relationship is likely due to the inaccurate distances to the AGN host galaxies. Our results help support the possibility that the R-L relationship could potentially be used to turn the BLRs of AGNs into standardizable candles. This would allow the cosmological expansion of the Universe to be probed by a separate population of objects, and over a larger range of redshifts.

Accepted for publication in ApJ; 25 pages, 11 figures; PDF version with all figures (5.1MB) can be downloaded from http://www.chara.gsu.edu/~bentz/rl2013.pdf

References in corpus (16)

• A luminous quasar at a redshift of z = 7.085
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• A New Sample of Low-mass Black Holes in Active Galaxies
• The Star-Forming Torus and Stellar Dynamical Black Hole Mass in the Seyfert 1 Nucleus of NGC3227
• A Reverberation-Based Mass for the Central Black Hole in NGC 4151
• Cosmic Evolution of Black Holes and Spheroids. III. The M-sigma relation in the last six billion years
• SFI++ I: A New I-band Tully-Fisher Template, the Cluster Peculiar Velocity Dispersion and H0
• The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping
• A Revised Broad-Line Region Radius and Black Hole Mass for the Narrow-Line Seyfert 1 NGC 4051
• Mass Functions of the Active Black Holes in Distant Quasars from the Sloan Digital Sky Survey Data Release 3
• Circumnuclear Gas in Seyfert 1 Galaxies: Morphology, Kinematics, and Direct Measurement of Black Hole Masses
• The Host Galaxy and Central Engine of the Dwarf AGN POX 52
• The Black Hole Mass of NGC 4151: Comparison of Reverberation Mapping and Stellar Dynamical Measurements
• Decomposition of the Host Galaxies of Active Galactic Nuclei Using Hubble Space Telescope Images
• SDSS J160531.84+174826.1: A Dwarf Disk Galaxy With An Intermediate-Mass Black Hole

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• Radiative Driving of the AGN Outflows in the Narrow-Line Seyfert 1 Galaxy NGC 4051
• Robotic Reverberation Mapping of the Southern Seyfert NGC 3783
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• The reverberation signatures of rotating disc winds in active galactic nuclei
• Modelling the AGN broad line region using single-epoch spectra II. Nearby AGN
• The Black Hole Mass of NGC 4151 from Stellar Dynamical Modeling
• An extended size-luminosity relation for the reverberation-mapped AGNs: the role of the accretion rate
• Expectations for time-delay measurements in active galactic nuclei with the Vera Rubin Observatory
• Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
• Estimating AGN Black Hole Masses via Continuum Reverberation Mapping in the Era of LSST
• A Steady-State Spectral Model For Electron Acceleration And Cooling In Blazar Jets: Application To 3C 279
• Considerations for the Observability of Kinematically Offset Binary AGN
• On the relation between hard X-ray photon index versus accretion rate for super-Eddington accreting quasars
• Monitoring the temperature and reverberation delay of the circumnuclear hot dust in NGC 4151
• Modeling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion disks sizes with the LSST
• Optical Continuum Reverberation in the Dwarf Seyfert Nucleus of NGC 4395
• Determination of magnetic field strength on the event horizon of supermassive black holes in active galactic nuclei
• Discarding the disc in a changing state AGN: the UV/X-ray relation in NGC 4151
• The accretion of a solar mass per day by a 17-billion solar mass black hole
• Extended X-ray Monitoring of Gravitational Lenses with Chandra and Joint Constraints on X-ray Emission Regions
• Interpreting broad emission-line variations II: Tensions between luminosity, characteristic size and responsivity
• Extreme quasars as distance indicators in cosmology
• A new method to obtain the Broad Line Region size of high redshift quasars
• Extended Ly$\alpha$ emission around quasars with eclipsing damped Ly$\alpha$ systems
• High Eddington quasars as discovery tools: current state and challenges
• Intermittent AGN episodes drive outflows with a large spread of observable loading factors
• Spatially Resolving the Kinematics of the <100 μas Quasar Broad Line Region using Spectroastrometry
• SDSS J0159 as an outlier in the Mbh-sigma space: further clues to support a central tidal disruption event?
• 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
• MUSE adaptive-optics spectroscopy confirms dual active galactic nuclei and strongly lensed systems at sub-arcsec separation
• The location of the dust causing internal reddening of active galactic nuclei
• Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
• Dust Reverberation of 3C273: torus structure and lag -- luminosity relation
• The Seoul National University AGN monitoring project. II. BLR size and black hole mass of two AGNs
• Black Hole Mass Estimation: How good is the virial estimate?
• The Gaseous Environments of Quasars: Associate Absorption Lines with Density and Distance Constraints
• H$\alpha$ Reverberation Mapping of the Intermediate-Mass Active Galactic Nucleus in NGC 4395
• The Binary Black Hole Model for Mrk 231 Bites the Dust
• Kinematic signatures of reverberation mapping of close binaries of supermassive black holes in active galactic nuclei. II. Atlas of two-dimensional transfer functions
• 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
• SALT long-slit spectroscopy of LBQS 2113-4538: variability of the Mg II and Fe II component
• The transient event in NGC 1566 from 2017 to 2019 -- I. An eccentric accretion disk and a turbulent, disk-dominated broad-line region unveiled by double-peaked Ca II and O I lines
• Black hole mass estimation using X-ray variability measurements in Seyfert galaxies
• Improving the Flux Calibration in Reverberation Mapping by Spectral Fitting: Application to the Seyfert Galaxy MCG--6-30-15
• Dependence of NLRs sizes on [OIII] luminosity in low redshift AGN with double-peaked broad Balmer emission lines
• Long-term monitoring of the broad-line region properties in a selected sample of AGN
• Are Narrow Line Seyfert 1 Galaxies powered by low mass black holes?
• Spectroastrometry and Reverberation Mapping: the Mass and Geometric Distance of the Supermassive Black Hole in the Quasar 3C 273
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• Long-term optical spectral monitoring of NGC 7469
• Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Four Season Observation Results
• The underlying driver for the \civ Baldwin effect in QSOs with $0<z<5$
• A persistent double nuclear structure in 3C 84
• Tully-Fisher Distances and Dynamical Mass Constraints for 24 Host Galaxies of Reverberation-Mapped AGN
• Variability and the size-luminosity relation of the intermediate mass AGN in NGC 4395
• A 6.4yr optical quasi-periodic oscillations in SDSS J075217.84+193542.2: a new candidate for central binary black hole system
• The z=0.54 LoBAL Quasar SDSS J085053.12+445122.5: II. The Nature of Partial Covering in the Broad-Absorption-Line Outflow
• Flares in the changing look AGN Mrk 590. I: The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disk
• Chemical abundances along the quasar main sequence
• Testing the relativistic Doppler boost hypothesis for supermassive binary black holes candidates via broad emission line profiles
• The supermassive black hole masses of reverberation-mapped active galactic nuclei
• Properties of long-term optical variability of active galactic nuclei with double-peaked broad low-ionization emission lines
• An X-ray variable absorber within the Broad Line Region in Fairall 51
• Single-Epoch Black Hole Mass Estimators For Broad-Line Active Galactic Nuclei: Recalibrating Hbeta with A New Approach
• SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
• The intermediate-ionization lines as virial broadening estimators for Population A quasars
• A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations
• Modelling time delays from two reprocessors in active galactic nuclei
• Simultaneous detection and analysis of optical and ultraviolet broad emission lines in quasars at z~2.2
• Estimating reddening of the continuum and broad-line region of active galactic nuclei: the mean reddening of NGC 5548 and the size of the accretion disc
• The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at $z\lesssim 1$
• Measuring black hole mass of type I active galactic nuclei by spectropolarimetry
• Robotic Reverberation Mapping of Arp 151
• The properties of active galaxies at the extreme of eigenvector 1
• An empirical relation to estimate host galaxy stellar light from AGN spectra
• Estimating supermassive black hole masses in AGNs using polarization of broad MgII, H$\alpha$ and H$\beta$ lines
• Effects of extended components of \oiii on the correlation between the \oiii luminosity and the power-law continuum luminosity for active galactic nuclei
• The Main Sequence of quasars: the taming of the extremes
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• Misclassified type 1 AGNs in the local universe
• Galactic Winds across the Gas-Rich Merger Sequence: I. Highly Ionized N V and O VI Outflows in the QUEST Quasars
• Behaviour of the MgII 2798AA Line Over the Full Range of AGN Variability
• Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line
• Distance Probes of Dark Energy
• Hot Corona Properties of Swift/BAT detected AGN
• On possible proxies of AGN light curves cadence selection in future time domain surveys
• The Most Massive Active Galactic Nuclei at $1\lesssim z\lesssim 2$
• UV spectral diagnostics for low redshift quasars: estimating physical conditions and radius of the Broad Line Region
• Constraints on Dark Energy Models Using Late Universe Probes
• AllBRICQS: the All-sky BRIght, Complete Quasar Survey
• Reverberation Mapping with Intermediate-Band Photometry: Detection of Broad-Line H$\alpha$ Time Lags for Quasars at $0.2<z<0.4$
• Ratio of black hole to galaxy mass of an extremely red dust-obscured galaxy at z = 2.52
• A Tentative Size-Luminosity Relation for the Iron Emission-Line Region in Quasars
• Dusty plasma in active galactic nuclei
• Reverberation Mapping of PG 0934+013 with the Southern African Large Telescope
• The SDSS-V Black Hole Mapper Reverberation Mapping Project: Unusual Broad-Line Variability in a Luminous Quasar
• Quasar main sequence in the UV plane
• A 3.8yr optical quasi-periodic oscillations in blue quasar SDSS J132144+033055 through combined light curves from CSS and ZTF
• Broad-line region configuration of the supermassive binary black hole candidate PG1302-102 in the relativistic Doppler boosting scenario
• Shedding New Light on Weak Emission-Line Quasars in the C${}_{\mathrm{IV}}$-H$\beta$ Parameter Space
• Estimation of the size and structure of the broad line region using Bayesian approach
• Wavelength-resolved reverberation mapping of intermediate redshift quasars HE 0413-4031 and HE 0435-4312: Dissecting Mg II, optical Fe II, and UV Fe II emission regions
• A note on periodicity of long-term variations of optical continuum in active galactic nuclei
• Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array II. Gamma-gamma absorption in the broad-line region radiation fields
• Unveiling slim accretion disc in AGN through X-ray and Infrared observations
• Reverberation-mapping of distant quasars: time-lag determination using different methods
• Estimating Black Hole Masses in Hundreds of Quasars
• The relativistic jet of the $\gamma$-ray emitting narrow-line Seyfert 1 galaxy PKS J1222$+$0413
• Diffuse emission in microlensed quasars and its implications for accretion-disk physics
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• The Discovery of a Hidden Broad Line AGN in a Bulgeless Galaxy: Keck NIR Spectroscopic Observations of SDSS J085153.64+392611.76
• The first look at Narrow-Line Seyfert 1 Galaxies with eROSITA
• Line shapes in narrow-line Seyfert 1 galaxies: a tracer of physical properties?
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. I. Reverberation and Differential Interferometric Signals of Tightly Wound Cases
• Rest-frame UV single-epoch black hole mass estimates of low-luminosity AGN at intermediate redshifts
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. II. Loosely Wound Cases: Reverberation Properties
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28
• Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei
• Modelling the AGN broad line region using single-epoch spectra I. The test case of Arp 151
• Evidence for Fluorescent Fe II Emission from Extended Low Ionization Outflows in Obscured Quasars
• The 'Big Dipper': The nature of the extreme variability of the AGN SDSS J2232-0806
• SDSS J154751.94+025550 with double-peaked broad Hβbut single-peaked broad Hα: a candidate for central binary black hole system?
• Jets, black holes and disks in blazars
• Powerful extragalactic jets dissipate their kinetic energy far from the central black hole
• [OIII] 5007A Emission Line Width as a Surrogate for stellar dispersion in Type 1 AGNs?
• Measuring the AGN sublimation radius with a new approach: reverberation mapping of the broad line polarization
• SDSS J1058+5443: A blue quasar does not have optical/NUV broad emission lines
• Getting More Out of Black Hole Superradiance: a Statistically Rigorous Approach to Ultralight Boson Constraints from Black Hole Spin Measurements
• Spectroscopy of broad absorption line quasars at $3\lesssim z\lesssim 5$ -- I: evidence for quasar winds shaping broad/narrow emission line regions
• Final stage of merging binaries of supermassive black holes: observational signatures
• Robotic reverberation mapping of the broad-line radio galaxy 3C 120
• BLR size in Realistic FRADO Model: The role of shielding effect
• 2MASX J00423991+3017515: An offset active galactic nucleus in an interacting system
• Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
• The puzzling X-ray continuum of the quasar MR 2251-178
• Constraints on Spin of a Supermassive Black Hole in Quasars with Big Blue Bump
• Main trends of the quasar main sequence -- effect of viewing angle
• Spectroscopic reverberation mapping of Quasar PKS 0736+017: Broad-Line Region and Black-hole Mass
• Discovery of the most luminous quasar of the last 9 Gyr
• Photoionization Modelling of the Giant Broad-Line Region in NGC 3998
• Spectroastrometric Reverberation Mapping of Broad-line Regions
• Individual Estimates of the Virial Factor in 10 Quasars: Implications on the Kinematics of the Broad Line Region
• The U.S. Naval Observatory VLBI Spectroscopic Catalog
• Conditional Neural Process for non-parametric modeling of AGN light curve
• The physical driver of the optical Eigenvector 1 in Quasar Main Sequence
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• The nature of massive black hole binary candidates: II. Spectral energy distribution atlas
• UV Fe II emission model of HE 0413-4031 and its relation to broad-line time delays
• An observational link between AGN Eddington ratio and [NII]λ6583/Ha at 0.6<z<1.7
• NGC 3147: a prototypical low-luminosity active galactic nucleus with double-peaked optical and ultraviolet lines
• Gemini Near Infrared Spectrograph - Distant Quasar Survey: Prescriptions for Calibrating UV-Based Estimates of Supermassive Black Hole Masses in High-Redshift Quasars
• Broadband Photometric Reverberation Mapping Analysis on SDSS-RM and Stripe 82 Quasars
• Properties of radio-loud quasars in Sloan Digital Sky Survey
• The long-term broad-line responsivity in MKN 110
• No Evidence for [O III] Variability in Mrk 142
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• On The Fine Tuning and Physical Origin of Line-Locked Absorption Systems in Active Galaxies
• Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei: II. Merged Broad Line Regions
• Testing Einstein's Equivalence Principle and its Cosmological Evolution from Quasar Gravitational Redshifts
• Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping:Monte Carlo Simulations
• A candidate of binary black hole system in AGN with broad Balmer emission lines having quite different line widths
• The AGN Hubble Diagram and Its Implications for Cosmology
• HI Spectroscopy of Reverberation-Mapped Active Galactic Nuclei
• Spectropolarimetry and spectral decomposition of high-accreting Narrow Line Seyfert 1 galaxies
• Evidence for a steeper SMBH-Bulge mass relationship extended to low masses using TDE host galaxies
• Spectroscopic AGN survey at $z$ $\sim$ 2 with NTT/SOFI for GRAVITY+ observations
• Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• Optical Continuum Reverberation Mapping of a Candidate IMBH in a Nearby Seyfert 1 Galaxy
• Strong Lensed QSOs with Variability Detectable by LSST: How many are there?
• A γ-ray emitting NLS1 galaxy SDSS J095909.51+460014.3 identified by multiwavelength contemporaneous brightening
• A Newborn AGN in a Starforming Galaxy
• Taming the derivative: diagnostics of the continuum and H$\beta$ emission in a prototypical Population B active galaxy
• Disentangling the optical AGN and Host-galaxy luminosity with a probabilistic Flux Variation Gradient
• Long-term variability of the composite galaxy SDSS J103911-000057: A candidate of true Type-2 AGN
• Determining sub-parsec supermassive black hole binary orbits with infrared interferometry
• A complex dust morphology in the high-luminosity AGN Mrk 876
• A Gaussian process cross-correlation approach to time delay estimation in active galactic nuclei
• Modelling the variable emission states of $\gamma$-ray emitting Narrow-Line Seyfert 1 galaxies
• The optically elusive, changing-look active nucleus in NGC 4156
• Measuring the Virial Factor in SDSS DR5 Quasars with Redshifted H$\beta$ and Fe ii Broad Emission Lines
• TLDR: Time Lag/Delay Reconstructor
• Changing look AGN Mrk 590: Broad line region and black hole mass from photometric reverberation mapping
• SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line
• The BRAVE Program - I: Improved Bulge Stellar Velocity Dispersion Estimates for a Sample of Active Galaxies
• Are broad optical balmer lines from central accretion disk in PG 1613+658?
• On the Structure of the AGN Torus through the Fraction of Optically-Selected Type 1 AGNs
• The variability of the broad-line Balmer decrement for quasars from the Sloan Digital Sky Survey Reverberation Mapping
• The ${\sigma }_{\mathrm{H}\beta }$-based dimensionless accretion rate and its connection with the corona for AGN
• 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
• Updated Picture of the Active Galactic Nuclei with Dusty/Dust-free Gas Structures and Effects of the Radiation Pressure
• Breaking the rules at $z\simeq$0.45: the rebel case of RBS 1055
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• Influence of the optical Fe II quasi-continuum on measuring the spectral parameters of active galactic nuclei
• AGN STORM 2: I. First results: A Change in the Weather of Mrk 817
• Spectropolarimetric measurements of hidden broad lines in nearby megamaser galaxies: a lack of clear evidence for a correlation between black hole masses and virial products
• Broadband spectral and temporal study of Ton 599 during the brightest January 2023 flare
• AGN Reverberation Mapping
• Measurement of the supermassive black hole masses in two active galactic nuclei by the photometric reverberation mapping method
• Super-Eddington accreting massive black holes explore high-$z$ cosmology: Monte-Carlo simulations
• The Great Slump: Mrk926 reveals discrete and varying Balmer line satellite components during a drastic phase of decline
• Spatially-resolved spectroscopy of narrow-line Seyfert 1 host galaxies
• A Pixon-Based Method for Reverberation-mapping Analysis in Active Galactic Nuclei
• The detections of inflowing gas from narrow absorption lines at the parsec scale
• Observational window effects on multi-object Reverberation Mapping
• Line shape variability in a sample of AGN with broad lines
• The Performance of Photometric Reverberation Mapping at High Redshift and the Reliability of Damped Random Walk Models
• The relationship between variable and polarized optical spectral components of luminous type 1 non-blazar quasars
• Dust Reverberation Mapping and Light-Curve Modelling of Zw229-015
• Measuring the Virial Factor in SDSS DR7 AGNs with Redshifted H$\beta$ and H$\alpha$ Broad Emission Lines
• Detection of eccentric close-binary supermassive black holes with incomplete interferometric data
• Spectral Energy Distribution Variations of Nearby Seyfert Galaxies During AGN Watch Monitoring Programs
• The Host Galaxy Fluxes of Active Galaxy Nuclei Are Generally Overestimated by the Flux Variation Gradient Method
• A comprehensive radio study of narrow-line Seyfert 1 galaxies
• Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
• H$\beta$ line shape and radius-luminosity relation in 2.5D FRADO
• Quasar Host Galaxies and the $M_{SMBH}$ - ${\sigma }_{\ast }$ Relation
• Searching for Low-Redshift Hot Dust-Obscured Galaxies
• An optical perspective on early-stage AGN with extreme radio flares
• A Mid-infrared Flare in the Seyfert Galaxy NGC 3786: A Changing-look Event Triggered by an Obscured Tidal Disruption Event?
• Size and kinematics of the CIV broad emission line region from microlensing-induced line profile distortions in two gravitationally lensed quasars
• Towards modelling Ghostly DLAs
• The Southern Hemisphere Narrow-Line Seyfert 1 Infrared Survey
• The Quasar 3C 47: Extreme Population B Jetted Source With Double-peaked Profile
• The Host Galaxy of the Dwarf Seyfert UGC 06728
• Continuum polarization reverberation mapping of AGNs
• Rarefied Broad-Line Regions in Active Galactic Nuclei: Anomalous Responses in Reverberation Mapping and Implications for Weak Emission-Line Quasars
• X-ray Unveiling Events in a z~1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
• Constraints on VHE gamma-ray emission of Flat Spectrum Radio Quasars with the MAGIC telescopes
• Chandra View of the LINER-type Nucleus in the Radio-Loud Galaxy CGCG 292-057: Ionized Iron Line and Jet-ISM Interactions
• Uncertainty Quantification of the Virial Black Hole Mass with Conformal Prediction
• Selection of highly-accreting quasars: Spectral properties of FeII emitters not belonging to extreme Population A
• An approach to robust Bayesian regression in astronomy
• HALO I: Photometric continuum reverberation mapping of Fairall 9
• Active Galactic Nuclei and their demography through cosmic time
• A Broker Integrated Algorithm for Gravitational Wave - Electromagnetic Counterpart Searches in O4a and O4b Runs
• A broad-line quasar with unexplained extreme velocity offsets: post-shock outflow?
• Determination of the Physical Parameters of AGNs in Seyfert 1 Galaxies LEDA 3095839 and VII Zw 244 Based on Spectropolarimetric Observations
• The CaFe Project: Optical FeII and Near-Infrared Ca II triplet emission in active galaxies. II. The driver(s) of the Ca II and Fe II and its potential use as a chemical clock
• Apparent \oiii variability in the narrow line Seyfert I Mrk142
• OzDES Reverberation Mapping Program: Stacking analysis with H$\beta$, Mg II and C IV
• Amoeba: An AGN Model of Optical Emissions Beyond steady-state Accretion discs
• Quasar Main Sequence unfolded by 2.5D FRADO (Natural expression of Eddington ratio, black hole mass, and inclination)
• Reverberation Mapping Data of NGC 5548 Imply a Multicomponent Broad-Line Region
• Modeling the Reverberation Response of the Broad Line Region in Active Galactic Nuclei II: Incorporating Photoionization Models
• Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
• PHL 6625: A Minor Merger-Associated QSO Behind NGC 247
• Modeling Fermi Large Area Telescope and Multiwavelength Data from Blazars
• Spins of SMBHs in distant low luminosity AGNs
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei
• Constraining Recoiling Velocities of Black Holes Ejected by Gravitational Radiation in Galaxy Mergers
• The implications of overmassive black holes at $z>5$ for quasar and black hole growth
• Intensive X-ray/UVOIR continuum reverberation mapping of the Seyfert AGN MCG+08-11-11
• New black hole mass calibrations and the fundamental plane of the broad-line region size, luminosity, and velocity
• Hunting for the nature of the enigmatic narrow-line Seyfert 1 galaxy PKS 2004-447
• Giant Broad Line Regions in Dwarf Seyferts
• Accretion in Active Galactic Nuclei
• Massive black holes and their galaxies
• Measuring monster MBHs: maybe mighty, maybe merely massive
• Optical Variability Structure Function of Low-Luminosity AGN using ATLAS Lightcurves
• The first supermassive black hole mass measurement in active galactic nuclei using the polarization of broad emission line Mg II
• Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns
• AGN BLR structure, luminosity and mass from combined Reverberation Mapping and Optical Interferometry observations
• Probing Quasar Viewing Angle with the Variability Structure Function
• A catalog of narrow-line Seyfert 1 galaxies in the southern hemisphere
• Testing the physical driver of Eigenvector 1 in Quasar Main Sequence
• Emission-Line and Continuum Reverberation Mapping of the NLS1 Galaxy WPVS 48
• Black Hole merger rates in the first billion years in light of JWST data
• Reverberation Mapping of Two Luminous Quasars: the Broad-line Region Structure and Black Hole Mass
• Constraining Nuclear Molecular Gas Content with High-resolution CO Imaging of GOALS Galaxies
• The optical-infrared relation for active galactic nuclei: The role of contaminations
• AllBRICQS: The Discovery of Luminous Quasars in the Northern Hemisphere
• Self-consistent dynamical model of the Broad Line Region
• Enhanced activity in close dual-AGN systems in the local Universe
• Precision near-IR spectroscopy for understanding AGN physics and shed light on the H0 tension -- SHARP Science Book
• Probing the Jet Turnover Frequency Dependence on Black Hole Mass and Mass Accretion Rate
• Geometry and kinematics of the broad emission line region in the lensed quasar Q2237+0305
• Tracing dark energy with quasars
• Search of Intermediate Mass Black Holes at Low Redshift with Intra-night Variability
• Application of the space-based optical interferometer towards measuring cosmological distances of quasars
• A Near-Infrared look at AGN Feedback in Bulgeless Galaxies