Vertical Structure of Accretion Discs with Hot Coronae in AGN

Abstract

We study vertical structure of radiation pressure dominated disc with a hot corona. We include all the relevant processes like bound--free opacity and convection. We show that the presence of the corona modifies considerably the density and the opacity of the disc surface layers which are important from the point of view of spectrum formation. The surface of the disc with a corona is much denser and less ionized than the surface of a bare disc. Such a disc is likely to produce a neutral reflection and a local spectrum close to a black body. This effect will help to reconcile the predictions of accretion disc models with the observational data since a neutral reflection and a lack of Lyman edge are generally seen in AGN.

arXiv comment10 pages, 9 figures, submitted to MNRAS

References in corpus (10)

• Global Structure and Dynamics of Advection-Dominated Accretion Flows Around Black Holes
• Multiwavelength observations of short time-scale variability in NGC 4151. IV. Analysis of multiwavelength continuum variability
• Photon Bubbles in Accretion Discs
• Limit-Cycle Behaviour of Thermally-Unstable Accretion Flows onto Black Holes
• Accretion Discs with Accreting Coronae in AGN - II. Nuclear Wind
• A New Equilibrium for Accretion Disks Around Black Holes
• The Vertical Structure and Ultraviolet Spectrum of X-Ray Irradiated Accretion Disks in Active Galactic Nuclei
• Variability of the iron K-emission line in the Seyfert 1 galaxy NGC 3516
• ACCRETION DISCS WITH ACCRETING CORONAE IN AGN. I. SOLUTIONS IN HYDROSTATIC EQUILIBRIUM
• Models of optical/UV continuum in AGN. Constraints from NGC 5548 monitoring campaign

Cited by in corpus (49)

• The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
• The origin of the Broad Line Region in Active Galactic Nuclei
• Thermal Instability and Photoionized X-ray Reflection in Accretion Disks
• A possible mechanism for multiple changing look phenomenon in Active Galactic Nuclei
• Radiation pressure instability driven variability in the accreting black holes
• Accretion disk models and their X-ray reflection signatures. I. Local spectra
• Measurements of accretion disc corona size in LMXB: consequences for Comptonization and LMXB models
• Iron Opacity Bump Changes the Stability and Structure of Accretion Disks in Active Galactic Nuclei
• The structure and radiation spectra of illuminated accretion discs in AGN. I. Moderate illumination
• The existence of warm and optically thick dissipative coronae above accretion disks
• The Structure and X-ray Recombination Emission of a Centrally Illuminated Accretion Disk Atmosphere and Corona
• On different types of instabilities in black hole accretion discs. Implications for X-ray binaries and AGN
• Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
• Radiation pressure instability as a variability mechanism in the microquasar GRS 1915+105
• Constraints on the black hole spin in the quasar SDSS J094533.99+100950.1
• The structure and radiation spectra of illuminated accretion disks in AGN. II. Flare/spot model of X-ray variability
• On the turbulent $\alpha$-disks and the intermittent activity in AGN
• X-ray iron line variability for the model of an orbiting flare above a black hole accretion disc
• The picture of BLR in 2.5-D FRADO: Dynamics & Geometry
• Warm and thick corona for magnetically supported disk in GBHB
• Variability of accretion flow in the core of the Seyfert galaxy NGC 4151
• Two-Dimensional Hydrodynamic Simulations of Convection in Radiation-Dominated Accretion Disks
• The Nature of the Emission Components in the Quasar/NLS1 PG1211+143
• The intermediate line region in active galactic nuclei
• Test of the Formation mechanism of the Broad Line Region in Active Galactic Nuclei
• Observational properties of puffy disks: radiative GRMHD spectra of mildly sub-Eddington accretion
• On the complex disc-corona interactions in the soft spectral states of Soft X-ray Transients
• Radiation pressure on dust explains the Low Ionized Broad Emission Lines in Active Galactic Nuclei
• The origin of emission and absorption features in Ton S180 Chandra observations
• A unified accretion disc model for supermassive black holes in galaxy formation simulations: method and implementation
• Iron lines from transient and persisting hot spots on AGN accretion disks
• Intermediate-line Emission in AGNs: The Effect of Prescription of the Gas Density
• Accretion disks, quasars and cosmology: meandering towards understanding
• Irradiation of accretion discs in active galactic nuclei due to warm absorber
• Testing a model of variability of X-ray reprocessing features in Active Galactic Nuclei
• Flare-induced fountains and buried flares in AGN
• Thermal Stability in Turbulently Mixed Accretion Discs
• Absorption features in the quasar HS 1603+3820 II. Distance to the absorber from photoionisation modelling
• The role of advection in the accreting corona model for active galactic nuclei and Galactic black holes
• BLR size in Realistic FRADO Model: The role of shielding effect
• Application of the FRADO model of BLR formation to the Seyfert galaxy NGC 5548 and the first step toward determining the Hubble constant
• Gravitational instability of discs with dissipative corona around supermassive black holes
• Local stability and global instability in iron-opaque disks
• Kelvin-Helmholtz Instability at the interface of a disc-corona system
• Dust photophoretic transport around a T Tauri star: Implications for comets composition
• Thin accretion disc with a corona in a central magnetic field
• Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K$\alpha$ X-ray Line Flux Variations Using Photo-Ionization Simulations
• Slim accretion disks: theory and observational consequences
• Non-thermal emission from fall-back clouds in the Broad-Line Region of Active Galactic Nuclei