Estimating Black Hole Masses in Active Galaxies Using the Halpha Emission Line

Abstract

It has been established that virial masses for black holes in low-redshift active galaxies can be estimated from measurements of the optical continuum strength and the width of the broad Hbeta line. Under various circumstances, however, both of these quantities can be challenging to measure or can be subject to large systematic uncertainties. To mitigate these difficulties, we present a new method for estimating black hole masses. From analysis of a new sample of broad-line active galactic nuclei, we find that Halpha luminosity scales almost linearly with optical continuum luminosity and that a strong correlation exists between Halpha and Hbeta line widths. These two empirical correlations allow us to translate the standard virial mass system to a new one based solely on observations of the broad Halpha emission line.

to appear in Apj; 8 pages; 5 figures; uses emulateapj5.sty

References in corpus (33)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• The Sloan Digital Sky Survey: Technical Summary
• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• The Sloan Digital Sky Survey Photometric Camera
• The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei
• The Third Data Release of the Sloan Digital Sky Survey
• Linear Regression for Astronomical Data with Measurement Errors and Intrinsic Scatter
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the M-sigma Relationship for AGNs
• Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
• A Search for "Dwarf" Seyfert Nuclei. IV. Nuclei with Broad H-alpha Emission
• Determining Central Black Hole Masses in Distant Active Galaxies
• Active Galactic Nuclei with Candidate Intermediate-Mass Black Holes
• Supermassive Black Holes in Active Galactic Nuclei. I. The Consistency of Black Hole Masses in Quiescent and Active Galaxies
• A Comparison of Stellar and Gaseous Kinematics in the Nuclei of Active Galaxies
• Radio Continuum Survey of an Optically-Selected Sample of Nearby Seyfert Galaxies
• What the Optical Recombination Lines Can Tell Us About the Broad Line Regions of Active Galactic Nuclei
• Nuclear Luminosities and Radio Loudness of Seyfert Nuclei
• Early-type galaxies in the SDSS. IV. Colors and chemical evolution
• A test for partial correlation with censored astronomical data
• Continuum and Emission Line Strength Relations for a large Active Galactic Nuclei Sample
• Accretion disk wind in the AGN broad-line region: Spectroscopically resolved line profile variations in Mrk110
• The Relationship Between Black Hole Mass and Velocity Dispersion in Seyfert 1 Galaxies
• The Profiles of H-Beta and [OIII] 5007 in Radio-Loud Quasars
• Black hole mass estimation with a relation between the BLR size and emission line luminosity of AGN
• The correlation of line strength with luminosity and redshift from composite QSO spectra
• The Central Engines of Radio-Loud Quasars

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• The Blackhole-Dark Matter Halo Connection
• Revealing the Broad Line Region of NGC 1275: The Relationship to Jet Power
• Does the intermediate mass black hole in LEDA 87300 (RGG 118) follow the near-quadratic (M_bh)-(M_spheroid) relation?
• Discovery of the luminous X-ray ignition eRASSt J234402.9$-$352640; I. Tidal disruption event or a rapid increase in accretion in an active galactic nucleus?
• Calibrating Mg II-based black-hole mass estimators using Low-to-High-Luminosity Active Galactic Nuclei
• A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
• Unusual Double-peaked Emission in the SDSS Quasar J093201.60+031858.7
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• Evidence for AGN-driven Outflows in Young Radio Quasars
• Statistical study of a large and cleaned sample of ultraluminous and hyperluminous X-ray sources
• Unexplored outflows in nearby low luminosity AGNs: the case of NGC 1052
• An FMOS Survey of moderate-luminosity broad-line AGN in COSMOS, SXDS and E-CDF-S
• The intrinsic Baldwin effect in broad Balmer lines of six long-term monitored AGNs
• Outflows, Shocks and Coronal Line Emission in a Radio-Selected AGN in a Dwarf Galaxy
• Black Hole Masses and Star Formation Rates of z >1 Dust Obscured Galaxies (DOGs): Results from Keck OSIRIS Integral Field Spectroscopy
• The Host Galaxy of the Quasar HE 0450-2958
• Photoionization-driven Absorption Lines Variability in Balmer Absorption Line Quasar LBQS 1206+1052
• Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
• Tol 2240-384 - a new low-metallicity AGN candidate
• Extreme Variability Quasars in Their Various States. I: The sample selection and composite SDSS spectra
• A Steady-State Spectral Model For Electron Acceleration And Cooling In Blazar Jets: Application To 3C 279
• Probing the Active Massive Black Hole Candidate in the Center of NGC 404 with VLBI
• Black holes as the source of dark energy: a stringent test with high-redshift JWST AGNs
• On the nature of the red, 2MASS selected AGN in the local Universe I: an optical spectroscopic study
• Tracing the outflow kinematics in Type 2 Active Galactic Nuclei
• PKS 0743$-$67: An Ultra-luminous Accretion Disk and a High Kinetic Luminosity Jet
• The variability of optical \feii emission in PG QSO 1700+518
• GA-NIFS and EIGER: A merging quasar host at z=7 with an overmassive black hole
• The optical variability of SDSS quasars from multi-epoch spectroscopy: I. Results from 60 quasars with $\ge$ six-epoch spectra
• Time Series Analysis of Active Galactic Nuclei: The case of Arp 102B, 3C 390.3, NGC 5548 and NGC 4051
• Kinematic signatures of AGN feedback in moderately powerful radio galaxies at z~2 observed with SINFONI
• Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
• Spectral nuclear properties of NLS1 galaxies
• Discovery of late-time X-ray flare and anomalous emission line enhancement after the nuclear optical outburst in a narrow-line Seyfert 1 Galaxy
• Low-Mass Active Galactic Nuclei with Rapid X-Ray Variability
• LBQS 0103-2753: A Binary Quasar in a Major Merger
• A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies
• The Extreme Red Excess in Blazar Ultraviolet Broad Emission Lines
• Mid-infrared Variability of Low-redshift Active Galactic Nuclei : Constraints on a Hot Dust Component with a Variable Covering Factor
• Black Hole - Bulge Relationship of Post-Starburst Quasars at z \sim 0.3
• Broad Balmer-line Absorption in SDSS J172341.10+555340.5
• Optical follow-up of the tick-tock massive black hole binary candidate
• A new sample of X-ray selected narrow emission-line galaxies. II. Looking for True Seyfert 2
• A persistent double nuclear structure in 3C 84
• A 6.4yr optical quasi-periodic oscillations in SDSS J075217.84+193542.2: a new candidate for central binary black hole system
• Rest-frame optical properties of luminous, radio-selected, broad absorption line quasars
• Reaching the Peak of the Quasar Spectral Energy Distribution I: Observations and Models
• A complete catalogue of broad-line AGNs and double-peaked emission lines from MaNGA integral-field spectroscopy of 10K galaxies: stellar population of AGNs, supermassive black holes, and dual AGNs
• The low-metallicity QSO HE 2158-0107: A massive galaxy growing by the accretion of nearly pristine gas from its environment?
• The underlying driver for the \civ Baldwin effect in QSOs with $0<z<5$
• Local Active Galactic Nuclei with Large Broad-Hα Variability Reside in Red Galaxies
• Multiwavelength Analysis of the Variability of the Blazar 3C 273
• Little Red Dots Are Nurseries of Massive Black Holes
• Nicmos Polarimetry of "Polar Scattered" Seyfert 1 Galaxies
• The Relation between Morphological Asymmetry and Nuclear Activity in Low-redshift Galaxies
• Host Galaxy Properties of Changing-look AGN Revealed in the MaNGA Survey
• The preferentially magnified active nucleus in IRAS F10214+4724 - III. VLBI observations of the radio core
• A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations
• 3C390.3: More Stable Evidence for Origination of Double-Peaked Broad Balmer Lines from Accretion Disk Near Central Black Hole
• Simultaneous detection and analysis of optical and ultraviolet broad emission lines in quasars at z~2.2
• Discovery of Dramatic Optical Variability in SDSS J1100+4421: A Peculiar Radio-Loud Narrow-Line Seyfert 1 Galaxy?
• Fantastic Fits with fantasy of Active Galactic Nuclei Spectra -- Exploring the Fe II emission near the H$\alpha$ line
• Active Galactic Nuclei with Double-Peaked Balmer Lines: I. Black Hole Masses and the Eddington ratios
• The Connection between 3.3 μm PAH Emission and AGN Activity
• JWST ERS Program Q3D: The pitfalls of virial BH mass constraints shown in a z = 3 quasar with an ultramassive host
• The Diverse Morphologies and Structures of Dwarf Galaxies Hosting Optically-Selected Active Massive Black Holes
• The Spectra of IceCube Neutrino (SIN) candidate sources -- V. Modeling and interpretation of multiwavelength and neutrino data
• Seoul National University Bright Quasar Survey in Optical (SNUQSO) I: First Phase Observations and Results
• X-ray spectroscopy of the candidate AGN in Henize 2-10 and NGC 4178: Likely supernova remnants
• SDSS J163459.82+204936.0: A Ringed Infrared-Luminous Quasar with Outflows in both Absorption and Emission Lines
• Kinematics of the Broad Line Region in M81
• Evolutionary Implications from SDSSJ085338.27+033246.1: A Spectacular N arrow-Line Seyfert 1 Galaxy with Young Post-starburst
• A Big Red Dot: Scattered light, host galaxy signatures and multi-phase gas flows in a luminous, heavily reddened quasar at cosmic noon
• Misclassified type 1 AGNs in the local universe
• Characterization of the emitting and absorbing media around the nucleus of the active galaxy UGC11763 using XMM-Newton data
• An Accreting, Anomalously Low Mass Black Hole at the Center of Low Mass Galaxy IC 750
• Nuclear Activity in the Low Metallicity Dwarf Galaxy SDSS J0944-0038: A Glimpse into the Primordial Universe
• Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line
• Dust Budget Crisis in Little Red Dots
• PKS1932-46: a radio source in an interacting group?
• Estimators of Bolometric Luminosity and Black Hole Mass with Mid-infrared Continuum Luminosities for Dust-obscured Quasars: Prevalence of Dust-obscured SDSS Quasars
• The Broad Wing of [O III] λ5007 Emission Line in Active Galactic Nuclei
• Resolving the dynamical mass of a z~1.3 QSO host galaxy using SINFONI and Laser Guide Star assisted Adaptive Optics
• Ratio of black hole to galaxy mass of an extremely red dust-obscured galaxy at z = 2.52
• Medium-resolution Optical and Near-Infrared Spectral Atlas of 16 2MASS-selected NIR-red Active Galactic Nuclei at $z\sim 0.3$
• Strong Response of the very broad h$\beta$ Emission Line in Luminous Radio-Quite Quasar pg1416-129
• A Multi-wavelength Analysis of Binary-AGN Candidate PSO J334.2028+01.4075
• Gemini IFU, VLA and HST observations of the OH Megamaser galaxy IRASF23199+0123: the hidden monster and its outflow
• A catalog of quasar properties from the Baryon Oscillation Spectroscopic Survey
• Baldwin Effect and Additional BLR Component in AGN with Superluminal Jets
• The warm outer layer of a Little Red Dot as the source of [Fe II] and collisional Balmer lines with scattering wings
• Impact of Resonance, Raman, and Thomson Scattering on Hydrogen Line Formation in Little Red Dots
• Providing stringent star formation rate limits of z$\sim$2 QSO host galaxies at high angular resolution
• The X-ray Properties of Million Solar Mass Black Holes
• The size of BLRs of low luminous Active Galactic Nuclei
• Identifying AGN's Balmer-Absorptions and stratified NLR kinematics in SDSSJ112611.63+425246.4
• UM 625 Revisited: Multiwavelength Study of A Seyfert 1 Galaxy with a Low-mass Black Hole
• A 3.8yr optical quasi-periodic oscillations in blue quasar SDSS J132144+033055 through combined light curves from CSS and ZTF
• A Novel Method to Identify AGNs Based on Emission Line Excess and the Nature of Low-luminosity AGNs in the Sloan Digital Sky Survey: II - Nature of Low-luminosity AGNs
• Kinematics of the H$\alpha$ and H$\beta$ broad line region in an SDSS sample of type 1 AGNs
• The nascent milliquasar VT J154843.06+220812.6: tidal disruption event or extreme accretion-state change?
• Kinematically Identified Recoiling Supermassive Black Hole Candidates in SDSS QSOs with z $<$ 0.25
• Variable AGN in the GALEX Time Domain Survey
• SHELLQs. Bridging the Gap: JWST Unveils Obscured Quasars in the Most Luminous Galaxies at z > 6
• Mrk 1239: a Type-2 Counterpart of Narrow-line Seyfert-1?
• The Correlation Between Spectral Index And Accretion Rate For AGN
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• Ultraviolet and Optical Emission-line Outflows in the Heavily Obscured Quasar SDSS J000610.67+121501.2: At the Scale of the Dusty Torus and Beyond
• [O III] emission line in narrow-line Seyfert 1 galaxies
• GA-NIFS: The highly overdense system BR1202-0725 at z $\sim$ 4.7. A double AGN with fast outflows plus eight companion galaxies
• A Little Red Dot at $\mathbf{z}=7.3$ within a Large Galaxy Overdensity
• A correlation between the stellar and [Fe II] velocity dispersions in Active Galaxies
• SDSS J085431.18+173730.5: The First Compact Elliptical Galaxy Hosting an Active Nucleus
• Rest-frame UV single-epoch black hole mass estimates of low-luminosity AGN at intermediate redshifts
• The SOUX AGN Sample: SDSS-XMM-Newton Optical, Ultraviolet and X-ray selected active galactic nuclei spanning a wide range of parameter space -- Sample definition
• Comparison of The UV and Optical Fe II Emission in Type 1 AGNs
• Quasars as standard candles VI: spectroscopic validation of the cosmological sample
• An Effective Selection Method for Low-Mass Active Black Holes and First Spectroscopic Identification
• The eROSITA Final Equatorial Depth Survey (eFEDS): the hard X-ray selected sample
• SDSS J154751.94+025550 with double-peaked broad Hβbut single-peaked broad Hα: a candidate for central binary black hole system?
• Estimating black hole masses: Accretion disk fitting versus reverberation mapping and single epoch
• A Deeply Buried Narrow-Line Seyfert 1 Nucleus Uncovered in Scattered Light
• Discovery of An Active Intermediate-Mass Black Hole Candidate in the Barred Bulgeless Galaxy NGC 3319
• SDSS J1058+5443: A blue quasar does not have optical/NUV broad emission lines
• Radio spectra of narrow-line Seyfert 1 galaxies observed with ATCA and VLASS
• Linear Spectropolarimetric Analysis of Fairall 9 with VLT/FORS2
• Discovery of soft and hard X-ray time lags in low-mass AGNs
• A Mid-infrared Flare in the Active Galaxy MCG-02-04-026: Dust Echo of a Nuclear Transient Event
• VLT/SINFONI study of black hole growth in high redshift radio-loud quasars from the CARLA survey
• Absorption at the dust sublimation radius and the dichotomy between X-ray and optical classification in the Seyfert galaxy H0557-385
• HSC-XD 52: An X-ray detected AGN in a low-mass galaxy at $z\sim 0.56$
• A big red dot at cosmic noon
• Dependence of the broad Fe K$\alpha$ line on the physical parameters of AGN
• Role of Feedback in AGN-HOST Coevolution: A Study from Partially Obscured Active Galactic Nuclei
• Determining the Locations of Dust Sources in FeLoBAL Quasars
• The ALPINE-CRISTAL-JWST Survey: Revealing Less Massive Black Holes in High-Redshift Galaxies
• A Spatially-Resolved Survey of Distant Quasar Host Galaxies: II. Photoionization and Kinematics of the ISM
• The Smallest AGN Host Galaxies
• JWST/NIRSpec spectroscopy of intermediate-mass quiescent galaxies at $z\sim 3-4$
• The sizes of BLRs and BH masses of double-peaked broad low-ionization emission line objects
• Understanding AGN-host connection in partially obscured active galactic nuclei. Part III: Properties of ROSAT-selected SDSS AGNs
• Investigating the evolution of the dual AGN system ESO~509-IG066
• Discovery of a Low-Redshift Hot Dust-Obscured Galaxy
• IRAS F13308+5946: A Possible Transition Phase From Type I ULIRG To Optical Quasar
• Spectroscopic reverberation mapping of Quasar PKS 0736+017: Broad-Line Region and Black-hole Mass
• SDSS J222428.53+261423.2: unique emission lines properties unveil a sub-kiloparsec dual AGN candidate
• Suspended and restored activities of A Nearby Super Massive Black Hole
• A Direct Linkage Between AGN Outflows in The Narrow-line Regions and The X-ray Emission From The Accretion disks
• Finding of a population of active galactic nuclei showing a significant luminosity decline in the past $\sim 10^{3-4}$ yrs
• The ubiquity of AGN winds in Seyfert 1 galaxies at low redshift
• Correlation between Line Width and Line Flux of Double-Peaked Broad Halpha of 3C390.3
• Discovery of Metastable He I* $\lambda$10830 Mini-broad Absorption Lines and Very Narrow Paschen $\alpha$ Emission Lines in the ULIRG Quasar IRAS F11119+3257
• The U.S. Naval Observatory VLBI Spectroscopic Catalog
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Intermediate-Mass Black Holes in Green Pea Galaxies (IMBH-GP) I: a Candidate Sample from LAMOST and SDSS
• B3\,0749+460A: A New "Changing-Look" Active Galactic Nucleus Associated with X-ray Spectral Slope Variations
• M94 As A Unique Testbed for Black Hole Mass Estimates and AGN Activity At Low Luminosities
• Dying of the Light: An X-ray Fading Cold Quasar at z ~ 0.405
• Gemini Near Infrared Spectrograph - Distant Quasar Survey: Prescriptions for Calibrating UV-Based Estimates of Supermassive Black Hole Masses in High-Redshift Quasars
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• Eddington Ratios of Dust-obscured Quasars at $z\lesssim 1$: Evidence Supporting Dust-obscured Quasars as Young Quasars
• The radio luminosity, black hole mass and Eddington ratio for quasars from the Sloan Digital Sky Survey
• Dwarf AGNs from Variability for the Origins of Seeds (DAVOS): Optical Variability of Broad-line Dwarf AGNs from the Zwicky Transient Facility
• A candidate of binary black hole system in AGN with broad Balmer emission lines having quite different line widths
• 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
• More Evidence for the Intermediate Broad Line Region of the Mapped AGN PG 0052+251
• Exploring the physics of the accretion and jet in nearby narrow-line Seyfert 1 galaxies
• Optical Continuum Reverberation Mapping of a Candidate IMBH in a Nearby Seyfert 1 Galaxy
• Fossil shell in 3C 84 as TeV $\gamma$-ray emitter and cosmic-ray accelerator
• The optically elusive, changing-look active nucleus in NGC 4156
• Long-term variability of the composite galaxy SDSS J103911-000057: A candidate of true Type-2 AGN
• AGN mass estimates in large spectroscopic surveys: the effect of host galaxy light
• Breaking the rules at $z\simeq$0.45: the rebel case of RBS 1055
• Detection of disk-jet co-precession in a tidal disruption event
• Broadband spectral and temporal study of Ton 599 during the brightest January 2023 flare
• Temperature Profiles of Accretion Disks in Luminous Active Galactic Nuclei derived from Ultraviolet Spectroscopic Variability
• Are broad optical balmer lines from central accretion disk in PG 1613+658?
• The Awakening Beast in the Seyfert 1 Galaxy KUG 1141+371 I
• Infrared spectroscopic confirmation of z~2 photometrically-selected obscured quasars
• On the Structure of the AGN Torus through the Fraction of Optically-Selected Type 1 AGNs
• Sub-millimeter Detected z~2 Radio-quiet QSOs: Accurate Redshifts, Black Hole Masses, and Inflow/Outflow Velocities
• Spectroscopic study of the [OIII]$\lambda$5007 profile in Seyfert 1 galaxies
• New Active Galactic Nuclei Detected by the ART-XC and eROSITA Telescopes during the First Five SRG All-Sky X-ray Surveys
• Multiple AGN activity during the BCG assembly of XDCPJ0044.0-2033 at z~1.6
• Swift Monitoring Observations of Mrk 231: Detection of Ultraviolet Variability
• Time Variable Broad Line Emission in NGC 4203: Evidence for Stellar Contrails
• SDSS-IV MaNGA: Identification and Multiwavelength Properties of Type-1 AGN in the DR15 sample
• Fading Light, Fierce Winds: JWST Snapshot of a Sub-Eddington Quasar at Cosmic Dawn
• The relationship of SMBHs and host galaxies at $z<4$ in the deep optical variability-selected AGN sample in the COSMOS field
• Extinction and AGN over host galaxy contrast effects on the optical spectroscopic classification of AGN
• Black hole mass of a quiescent galaxy hosting a Type 1 AGN at z=2.09: Implications for black hole - galaxy co-evolution and AGN quenching at high redshift
• Radio Scrutiny of the X-ray-Weak Tail of Low-Mass Active Galactic Nuclei: A Novel Signature of High-Eddington Accretion?
• Extreme Neutral Outflow in a non-AGN Quiescent Galaxy at z~1.3
• Quasar Host Galaxies and the $M_{SMBH}$ - ${\sigma }_{\ast }$ Relation
• Characterization of the continuum and kinematical properties of nearby NLS1
• Feeding the Dead: Neutral Gas Inflow in a Long-Quenched Ancient Massive Galaxy at $z\sim 2.7$ Observed with JWST/NIRSpec
• The Southern Hemisphere Narrow-Line Seyfert 1 Infrared Survey
• JWST's PEARLS: A z=6 quasar in a train-wreck galaxy merger system
• A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Hα Emission
• X-ray Properties of Optically Variable Low-mass AGN Candidates
• Fossil shell emission in dying radio loud AGNs
• Spectral Energy Distribution Variations of Nearby Seyfert Galaxies During AGN Watch Monitoring Programs
• Searching for Low-Redshift Hot Dust-Obscured Galaxies
• Three Spectacular HII-buried-AGN Galaxies from SDSS
• A Mid-infrared Flare in the Seyfert Galaxy NGC 3786: A Changing-look Event Triggered by an Obscured Tidal Disruption Event?
• Leaked Lya emission: an indicator of the size of quasar absorption outflows
• Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy
• 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
• Comparing Reflection and Absorption Models for the Soft X-ray Variability in the NLS1 AGN UGC 11763
• A Broker Integrated Algorithm for Gravitational Wave - Electromagnetic Counterpart Searches in O4a and O4b Runs
• The black hole masses of extremely luminous radio-WISE selected galaxies
• Constraints on VHE gamma-ray emission of Flat Spectrum Radio Quasars with the MAGIC telescopes
• SDSS J143030.22-001115.1: A misclassified narrow-line Seyfert 1 galaxy with flat X-ray spectrum
• The Quasar 3C 47: Extreme Population B Jetted Source With Double-peaked Profile
• the impact of the AGN and the torus properties on the evolution of spiral galaxies
• Uncertainty Quantification of the Virial Black Hole Mass with Conformal Prediction
• Shedding the envelope: JWST reveals a kiloparsec-scale [OIII]-weak Balmer shell around a z=7.64 quasar
• Is radio jet power linearly proportional to the product of central black hole mass and Eddington ratio in AGN?
• Black Hole masses for 14 gravitational lensed quasars
• On the orientation of Narrow Line Seyfert I
• The dynamics of the broad-line region in NGC 3227
• The broad band SEDs of four 'hypervariable' AGN
• MIRI spectrophotometry of GN-z11: Detection and nature of an optical red continuum component
• Evolution of Size, Mass, and Density of Galaxies Since Cosmic Dawn
• MARTA: The connection between chemical enrichment, feedback, and dust in a Wolf-Rayet galaxy at z$\sim$2
• Mass assembly and AGN activity at $z\gtrsim 1.5$ in the dense environment of XDCPJ0044.0-2033
• Association of Optical, Ultraviolet and Soft X-ray excess Emissions in AGNs
• Apparent \oiii variability in the narrow line Seyfert I Mrk142
• The Cliff: A Metal-Poor Little Red Dot Hosting an Overmassive Black Hole at $z=3.55$
• Interactions among intermediate redshift galaxies. The case of SDSSJ134420.86+663717.8
• Neutrinos from extreme astrophysical sources
• Investigating the origin of radio emission in candidate super-Eddington accreting black holes
• A stellar dynamical mass measurement of an inactive black hole at redshift 2
• Giant Broad Line Regions in Dwarf Seyferts
• The implications of overmassive black holes at $z>5$ for quasar and black hole growth
• New Active Galactic Nuclei Detected by the ART-XC and eROSITA Telescopes during the First Five SRG All-Sky X-ray Surveys. Part 2
• JWST Spectroscopic View of a Rapidly Growing Dust-obscured Quasar at $z\sim 4$: Effect of Dust Extinction Correction on Black Hole Mass and Eddington Ratio Estimation
• Constraining Recoiling Velocities of Black Holes Ejected by Gravitational Radiation in Galaxy Mergers
• The rise and fall of Little Red Dots could be driven by the environment
• Quiescent Host Galaxies of Extended Quasars Revealed by Spectrophotometric Decomposition
• Enhanced activity in close dual-AGN systems in the local Universe
• The role of AGN activity in the building up of the BCG at z~1.6
• Massive black holes in the first billion years with JWST
• Cosmological simulations predict that AGN preferentially live in gas-rich, star-forming galaxies despite effective feedback
• BASS XXX: Distribution Functions of DR2 Eddington-ratios, Black Hole Masses, and X-ray Luminosities
• The Relationship Between Emission Line and Continuum Luminosity and the Baldwin Effect in Blazars. I. The Case of the Mg II λ2798 Å Emission Line
• A quasar shedding its dust cocoon at redshift 2
• Massive black holes and their galaxies
• Search of Intermediate Mass Black Holes at Low Redshift with Intra-night Variability
• On the non-evolution of the dependence of black hole masses on bolometric luminosities for QSOs
• Black Hole merger rates in the first billion years in light of JWST data
• A Comprehensive JWST/NIRSpec Census of Broad-line Active Galactic Nuclei: Faint, Low-mass Accretors and a Population of Little Red Dots