A Structure for Quasars

Abstract

This paper proposes a simple, empirically derived, unifying structure for the inner regions of quasars. This structure is constructed to explain the broad absorption line (BAL) regions, the narrow `associated' ultraviolet and X-ray warm absorbers (NALs); and is also found to explain the broad emission line regions (BELR), and several scattering features, including a substantial fraction of the broad X-ray Iron-K emission line, and the bi-conical extended narrow emission line region (ENLR) structures seen on large kiloparsec scales in Seyfert images. Small extensions of the model to allow luminosity dependent changes in the structure may explain the UV and X-ray Baldwin effects and the greater prevalence of obscuration in low luminosity AGN.

35 pages, including 8 color figures (figures 4abc are big). Astrophysical Journal, in press. Expanded version of conference paper astro-ph/0005161

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• The X-ray/UV absorber in NGC 4593
• Strong UV and X-ray variability of the Narrow Line Seyfert 1 Galaxy WPVS 007 -- on the nature of the X-ray low state
• Transient obscuration event captured in NGC~3227 II. Warm absorbers and obscuration events in archival XMM-Newton and NuSTAR observations
• Accretion disk wind as explanation for the broad-line region structure in NGC 5548
• Strong Variability of Overlapping Iron Broad Absorption Lines in Five Radio-selected Quasars
• Detection of an Iron Emission Feature from the Lensed BAL QSO H1413+117 at z=2.56
• Quasar broad absorption line variability measurements using reconstructions of un-absorbed spectra
• The WISSH quasars project XI. The mean Spectral Energy Distribution and Bolometric Corrections of the most luminous quasars
• C IV BAL disappearance in a large SDSS QSO sample
• Gravitational Lenses as High-Resolution Telescopes
• X-ray polarimetric signatures induced by spectral variability in the framework of the receding torus model
• Optical and JWST Mid-IR Emission Line Diagnostics for Simultaneous IMBH and Stellar Excitation in z~0 Dwarf Galaxies
• A disc wind model for blueshifts in quasar broad emission lines
• Quenching by gas compression and consumption: A case study of a massive radio galaxy at z = 2.57
• The estimate of emission region locations of {\it Fermi} FSRQs
• 'Disc-jet' coupling in black hole X-ray binaries and active galactic nuclei
• Rotation and outflow in the central kiloparsec of the water megamaser galaxies IC 2560, NGC 1386, NGC 1052, and Mrk 1210
• XMM-Newton observation of PG 0844 + 349
• Microlensing of a Ring Model for Quasar Structure
• Accretion disks, quasars and cosmology: meandering towards understanding
• Microlensing Constraints on Broad Absorption and Emission Line Flows in the Quasar H1413+117
• A new method to obtain the Broad Line Region size of high redshift quasars
• On the Location and Composition of the Dust in the MCG-6-30-15 Warm Absorber
• Host Dark Matter Halos of WISE-selected Obscured & Unobscured Quasars: Evidence for Evolution
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. III. A population study on ultra-fast outflows
• Decoupling absorption and continuum variability in the Seyfert 2 NGC 4507
• Extreme quasars as distance indicators in cosmology
• Suzaku reveals X-ray continuum piercing the nuclear absorber in Markarian 231
• Herschel-ATLAS: the far-infrared properties and star-formation rates of broad absorption line quasi-stellar objects
• The Nature of LoBAL QSOs: I. SEDs and mid-infrared spectral properties
• Resolving the Inner Structure of QSO Discs by Fold Caustic Crossing Events
• The environment of weak emission-line quasars
• The Physical Conditions of the Intrinsic N V Narrow Absorption Line Systems of Three Quasars
• Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey
• Accretion Disc Winds in Tidal Disruption Events: Ultraviolet Spectral Lines as Orientation Indicators
• X-ray Absorption in Type II Quasars: Implications for the Equatorial Paradigm of Broad Absorption Line Quasars
• Quasar emission lines as probes of orientation: implications for disc wind geometries and unification
• Evidence for photoionization-driven variability in narrow absorption lines
• Chandra Observations of the QSO Pair Q2345+007: Binary Quasar or Massive Dark Lens?
• A structure for quasars under the scope of polarisation I. The UV/optical polarisation dichotomy of type-1 and type-2 AGN
• Dust-driven wind as a model of Broad Absorption Line quasars
• The End of the Black Hole Dark Ages, and Warm Absorbers
• Multiwavelength campaign on Mrk 509 XV. A global modeling of the broad emission lines in the Optical, UV and X-ray bands
• A Two-Phase Low-velocity Outflow in the Seyfert 1 Galaxy Ark~564
• Constraining quasar structure using high-frequency microlensing variations and continuum reverberation
• Irradiation of accretion discs in active galactic nuclei due to warm absorber
• Unraveling the complex structure of AGN-driven outflows: V. Integral-field spectroscopy of 40 moderate-luminosity Type-2 AGNs
• Strong gravitational lensing as a tool to investigate the structure of jets at high energies
• Testing General Relativity with High-Resolution Imaging of Sgr A*
• The Origins of a Rich Absorption Line Complex in a Quasar at Redshift 3.45
• Probing the unified model in NGC 7314
• Rest-frame optical properties of luminous, radio-selected, broad absorption line quasars
• Suzaku Observations of Three FeLoBAL QSOs, SDSS J0943+5417, J1352+4239, and J1723+5553
• A long look at the BALQSO LBQS 2212-1759 with XMM-Newton
• Do broad absorption line quasars live in different environments from ordinary quasars?
• LLAMA: Stellar populations in the nuclei of ultra hard X-ray selected AGN and matched inactive galaxies
• The Physical Properties of Low-Redshift FeLoBAL Quasars: II. The Rest-Frame Optical Emission Line Properties
• On the Steady Nature of Line-Driven Disk Winds
• XMM-Newton observations of the Seyfert 1 AGN H0557-385
• The case for inflow of the broad-line region of active galactic nuclei
• Spectropolarimetric Evidence for Radiatively Inefficient Accretion in an Optically Dull Active Galaxy
• Long-term X-ray stability and UV variability of the ionized absorption in NGC 3783
• Connection between accretion disk and superluminal radio jets and the role of radio plateau state in GRS 1915+105
• Resolving the Clumpy Structure of the Outflow Winds in the Gravitationally Lensed Quasar SDSS J1029+2623
• XMM observations of BAL Quasars with polar outflows
• Accretion disk winds in active galactic nuclei: X-ray observations, models, and feedback
• Hunting for Metals Using XQ-100 Legacy Survey Composite Spectra
• Vanishing Absorption and Blueshifted Emission in FeLoBAL Quasars
• Nuclear obscuration in the high-ionization Seyfert 2 galaxy Tol 0109-383
• Spectroscopy along Multiple, Lensed Sightlines through Outflowing Winds in the Quasar SDSS J1029+2623
• X-ray absorption variability in NGC 4507
• An Infrared Excess Identified in Radio-Loud Broad Absorption Line Quasars
• The rest-frame ultraviolet properties of radio-loud broad absorption line quasars
• X-ray polarimetry as a new tool to discriminate reflection from absorption scenarios -- Predictions for MCG-6-30-15
• Observational hints on the torus obscuring gas behaviour through X-rays with NuSTAR data
• The most luminous blue quasars at 3.0<z<3.3. II. CIV/X-ray emission and accretion disc physics
• Appearance vs Disappearance of broad absorption line troughs in quasars
• Accretion Disc Structure and Orientation in the Lensed and Microlensed Q0957+561 Quasar
• Surprises from a deep ASCA spectrum of a Broad Absorption Line Quasar PHL 5200
• Q2237+0305 source structure and dimensions from light curves simulation
• Detection of blueshifted emission and absorption and a relativistic Iron line in the X-ray spectrum of ESO 323-G077
• H$\beta$ Line Widths as an Orientation Indicator for Low-Ionization Broad Absorption Line Quasars
• Connecting Low- and High-Redshift Weak Emission-Line Quasars via HST Spectroscopy of Ly$\alpha$ Emission
• 3D Distribution Map of HI Gas and Galaxies Around an Enormous Ly$\alpha$ Nebula and Three QSOs at $z=2.3$ Revealed by the HI Tomographic Mapping Technique
• FUSE Observations of the Narrow-Line Seyfert 1 Galaxy Arakelian 564
• Using the Properties of Broad Absorption Line Quasars to Illuminate Quasar Structure
• Probing the environment of high-z quasars using the proximity effect in projected quasar pairs
• The Main Sequence of quasars: the taming of the extremes
• Are SMBHs shrouded by "super-Oort" clouds of comets and asteroids?
• Galactic Winds across the Gas-Rich Merger Sequence: I. Highly Ionized N V and O VI Outflows in the QUEST Quasars
• Study of relativistic accretion flow around KTN black hole with shocks
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• Disappearance of a narrow Mg II absorption system with a measured velocity up to $166,000km{\mathrm{s}}^{-1}$
• A SCUBA-2 survey of FeLoBAL QSOs: Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?
• Chandra and XMM-Newton view of the Warm Absorbing Gas in Mrk 290
• Strong Gravitational Lensing and the Structure of Quasar Outflows
• XMM-Newton observations of warm absorbers in PG quasars
• VLBA Multi-frequency Polarimetric imaging of Radio-loud Broad Absorption Line Quasars
• Time Dependent Photoionization Modeling of Warm Absorbers in Active Galactic Nuclei
• The X-ray variability history of Markarian 3
• SIROCCO: A Publicly Available Monte Carlo Ionization and Radiative Transfer Code for Astrophysical Outflows
• Chandra Observation of 3C 212: a New Look at the X-ray and UV Absorbers
• Search for intrinsic NALs in BAL/mini-BAL quasar spectra
• Broad He I 1.08 μm absorption from the obscurer in the active galaxy NGC 5548
• Dusty plasma in active galactic nuclei
• Broad-band spectral energy distribution of 3000 Angstroem break quasars from the Sloan Digital Sky Survey
• Polarization of Quasars: Resonant Line Scattering in the Broad Absorption Line Region
• Clumpy winds and the obscuration of Active Galactic Nuclei
• APEX at the QSO MUSEUM: molecular gas reservoirs associated with $z\sim$3 quasars and their link to the extended Ly$\alpha$ emission
• Host Dark Matter Halos of SDSS Red and Blue Quasars: No Significant Difference in Large-scale Environment
• Measuring Lensing Magnification of Quasars by Large Scale Structure using the Variability-Luminosity Relation
• The orientation and polarization of broad absorption line quasars
• Narrow Absorption Lines Complex. III. Gradual Transition from Type S to Type N Broad Absorption Line
• Radio and X-ray emission from disc winds in radio-quiet quasars
• NIR imaging spectroscopy of the inner few arcseconds of NGC 4151 with OSIRIS at Keck
• Stability of Gas Clouds in Galactic Nuclei: An Extended Virial Theorem
• Crepuscular Rays from the Highly Inclined Active Galactic Nucleus in IC 5063
• [OIII] emission in z=2 quasars with and without Broad Absorption Lines
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• Multiwavelength campaign on Mrk 509 XIV. Chandra HETGS spectra
• A test of the failed disk wind scenario for the origin of the broad line region in active galactic nuclei
• Unraveling the complex structure of AGN-driven outflows: IV. Comparing AGNs with and without strong outflows
• Evidence for an accelerating wind as the broad-line region in NGC 3516
• The polarized signal from broad emmission lines in AGN
• Time variability of ultra-fast BAL outflows using SALT: C IV equivalent width analysis
• Active Galactic Nuclei at the Crossroads of Astrophysics
• Magnetohydrodynamic DiscWinds and LineWidth Distributions.II
• Polarization of Quasars: Electron Scattering in the Broad Absorption Line Region
• Dust Dynamics in AGN Winds: A New Mechanism For Multiwavelength AGN Variability
• Spectroscopy of broad absorption line quasars at $3\lesssim z\lesssim 5$ -- I: evidence for quasar winds shaping broad/narrow emission line regions
• A detailed analysis of the high resolution X-ray spectra of NGC 3516: Variability of the ionized absorbers
• A VLBI survey of compact broad absorption line quasars with balnicity index BI>0
• A VLBI survey of compact Broad Absorption Lines (BAL) quasars with BALnicity Index BI=0
• Multi-Sightline Observation of Narrow Absorption Lines in Lensed Quasar SDSS J1029+2623
• A Giant Loop of Ionized Gas Emerging from the Tumultuous Central Region of IC 5063
• Radio-Loud and Radio-Quiet BAL Quasars: A Detailed Ultraviolet Comparison
• Physical and kinematical properties of the X-ray absorber in the broad absorption line quasar APM 08279+5255
• Radiation-pressure Waves and Multiphase Quasar Outflows
• Polarization and kinematics in Cygnus A
• Fraction of broad absorption line quasars in different radio morphologies
• Does Size Matter? The Underlying Intrinsic Size Distribution of Radio Sources and Implications for Unification by Orientation
• Variability of broad absorption lines in a QSO SDSS J022844.09+000217.0 on multi-year timescales
• The Study of Circumgalactic Medium with Quasar Pairs
• Gravitational Microlensing and the Structure of Quasar Outflows
• The XMM-Newton spectrum of a candidate recoiling supermassive black hole: an elusive inverted P-Cygni profile
• Investigating the radio-loud phase of broad absorption line quasars
• Gravitational Lensing of Anisotropic Sources
• Observing the redshifted 21 cm signal around a bright QSO at $z\sim 10$
• Misalignment of the Jet and the Normal to the Dusty Torus in the Broad Absorption Line QSO FIRST\,J155633.8+351758
• Direct Microlensing-Reverberation Observations of the Intrinsic magnetic Structure of AGN in Different Spectral States: A Tale of Two Quasars
• The Nature of the UV/X-Ray Absorber in PG 2302+029
• Density profile of ambient circumnuclear medium in Seyfert 1 galaxies
• X-rays from a radio-loud compact BAL Quasar 1045+352 and the nature of outflows in radio-loud BAL Quasars
• On the X-ray low- and high-velocity outflows in AGNs
• Conditional Neural Process for non-parametric modeling of AGN light curve
• On the scattering enhancement of Nv1240 emission line of quasi-stellar objects
• Is there a connection between Broad Absorption Line Quasars and Narrow Line Seyfert 1 galaxies?
• The ionised X-ray outflowing torus in ESO 323-G77: low-ionisation clumps confined by homogeneous warm absorbers
• Characterizing the Advective Hot Flows of Nova-Like Cataclysmic Variables in the X-rays: The case of BZ Cam and V592 Cas
• The long-term broad-line responsivity in MKN 110
• Origin of the complex iron line structure and spectral variation in Mrk 766
• Forgotten treasures in the HST/FOC UV imaging polarimetric archives of active galactic nuclei. I. Pipeline and benchmarking against NGC~1068 and exploring IC~5063
• SDSS J153636.22+044127.0 and its analogues: shocked outflows, not active binary black holes
• A Hubble Space Telescope Imaging Study of Four FeLoBAL Quasar Host Galaxies
• A multi-wavelength continuum characterization of high-redshift broad absorption line quasars
• Intranight optical variability of radio-loud broad absorption line quasars
• Atomic X-ray Spectroscopy of Accreting Black Holes
• Quasars with Anomalous Hβ Profiles I: Demographics
• Influence of gravitational microlensing on broad absorption lines of QSOs: The case of the Fe K$\alpha$ line
• Galaxies as High-Resolution Telescopes
• Spectroscopic Observations of the Outflowing Wind in the Lensed Quasar SDSS J1001+5027
• HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum
• The WISSH quasars project VII. The impact of extreme radiative field in the accretion disk and X-ray corona interplay
• Investigating the complex X-ray spectrum of a broad-line 2MASS red quasar: XMM-Newton observation of FTM 0830+3759
• Restarting radio activity and dust emission in radio-loud broad absorption line quasars
• The physical constraints on a new LoBAL QSO at z=4.82
• Response of the warm absorber cloud to a variable nuclear flux in active galactic nuclei
• The unusual UV continuum of quasar Ton 34 and the possibility of crystalline dust absorption
• Signature of outflows in strong MgII absorbers in quasar sightlines
• The Wind Dynamics of Super-Eddington Sources in FRADO
• The detections of inflowing gas from narrow absorption lines at the parsec scale
• Modeling Warm Absorption in HST/COS Spectrum of Mrk 290 with XSTAR
• Physical characterization of the FeLoBAL outflow in SDSS J0932+0840: Analysis of VLT/UVES observations
• Probing Broad Absorption Line Quasar Outflows: X-ray Insights
• Black hole-galaxy co-evolution and the role of feedback
• Constraints on the optical polarization source in the luminous non-blazar quasar 3C 323.1 (PG 1545+210) from the photometric and polarimetric variability
• Spectropolarimetry of NGC3783 and Mrk509: Evidence for powerful nuclear winds in Seyfert 1 Galaxies
• H$\beta$ line shape and radius-luminosity relation in 2.5D FRADO
• On reverberation and cross-correlation estimates of the size of the broad-line region in active galactic nuclei
• Are there broad absorption-line blazars?
• MCMC-based Voigt Profile fitting to a Mini-BAL System in the Quasar UM675
• A Search for Blazar Activity in Broad-Absorption-Line Quasars
• Hubble Space Telescope Observations of BALQSO Ton 34 Reveal a Connection between the Broad Line Region and the BAL Outflow
• Reverberation in the UV-Optical Continuum Brightness Fluctuations of MACHO Quasar 13.5962.237
• Balmer line shifts in quasars
• Apparent counter-rotation in the torus of NGC 1068: influence of an asymmetric wind
• Broad Emission and Absorption Line Outflows in the Quasar SDSS J163345.22+512748.4
• A Giant Metrewave Radio Telescope Survey of Radio-loud Broad Absorption Line Quasars
• BASS XLV: Quantifying AGN Selection Effects in the Chandra COSMOS-Legacy Survey with BASS
• Exploratory Study of Transverse Proximity Effect around BAL Quasars
• Metallicity Ceiling in Quasars from Recycled Stellar Winds
• The Nature of LoBAL QSOs: II. HST/WFC3 Observations Reveal Host Galaxies Dominated by Mergers
• Amoeba: An AGN Model of Optical Emissions Beyond steady-state Accretion discs
• Modeling the Reverberation Response of the Broad Line Region in Active Galactic Nuclei II: Incorporating Photoionization Models
• The central structure of Broad Absorption Line QSOs: observational characteristics in the cm-mm wavelength domain
• The Narrow Line Region in 3D: mapping AGN feeding and feedback
• Investigating the origin of radio emission in candidate super-Eddington accreting black holes
• Broadband nuclear emission in two radio-loud BAL quasars
• Environment or Outflows? New insight into the origin of narrow associated QSO absorbers
• Fast outflows in broad absorption line quasars and their connection with CSS/GPS sources
• Jet-driven shocks and turbulence in radio-loud Active Galactic Nuclei observed with JWST MIRI/MRS
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei
• On the Relation between the Inclination Angle of the Accretion Disk and the Broad-line Region in Active Galactic Nuclei
• Grating X-ray Spectroscopy of High-Velocity Outflows from Active Galaxies
• Ubiquitous column density variability in Seyfert 2 Galaxies
• Fast Outflowing Warm Absorbers in Narrow-Line Seyfert 1 Galaxy PG 1001+054 Revealed by HST/COS Spectra
• Quasar emission lines as virial luminosity estimators
• Serendipitous Discovery of Warm Absorbers in the Seyfert 2 Galaxy IRAS 18325-5926
• Capturing dual AGN activity and kiloparsec-scale outflows in IRAS 20210+1121
• Matter Outflows from AGN: A Unifying Model
• Quasars: from the Physics of Line Formation to Cosmology
• Distances on Cosmological Scales with VLTI
• Inflow Generated X-ray Corona Around Supermassive Black Holes and Unified Model for X-ray Emission
• On The Formation Of Multiple Absorption Troughs In Broad Absorption Line QSOs
• Metal-strong Inflows at the Outer-galactic-scale of a Quasar
• Ionized Gas Outflows and Shock-Heated Emission in the Highly Inclined Active Galaxy CGCG 012-070
• Shape and ionization of equatorial matter near compact objects from X-ray polarization reflection signatures
• Long-Term X-ray Spectral Variability of Seyfert Galaxies with Swift
• Quasar Redshifts: The Intrinsic Component
• High resolution studies of Broad Absorption Line radio-loud quasars