The formation of the coronal flow/ADAF

Abstract

We develop a new method to describe the accretion flow in the corona above a thin disk around a black hole in vertical and radial extent. The model is based on the same physics as the earlier one-zone model, but now modified including inflow and outflow of mass, energy and angular momentum from and towards neighboring zones. We determine the radially extended coronal flow for different mass flow rates in the cool disk resulting in the truncation of the thin disk at different distance from the black hole. Our computations show how the accretion flow gradually changes to a pure vertically extended coronal or advection-dominated accretion flow (ADAF). Different regimes of solutions are discussed. For some cases wind loss causes an essential reduction of the mass flow.

8 pages, 4 figures, accepted for publication in A&A

References in corpus (4)

• Two-temperature coronal flow above a thin disk
• Truncation of geometrically thin disks around massive black holes in galactic nuclei
• The effect of disk magnetic fields on the truncation of geometrically thin disks in AGN
• The change from accretion via a thin disk to a coronal flow: dependence on the viscosity of the hot gas

Cited by in corpus (22)

• Semi-implicit scheme for treating radiation under M1 closure in general relativistic conservative fluid dynamics codes
• Accretion disc variability in the hard state of black hole X-ray binaries
• Hysteresis in spectral state transitions - a challenge for theoretical modeling
• Constraints for the accretion disk evaporation rate in AGN from the existence of the Broad Line Region
• Discovery of photon index saturation in the black hole binary GRS 1915+105
• The Dependence of Spectral State Transition and Disk Truncation on Viscosity Parameter $α
• Spectral state transitions in low-mass X-ray binaries - the effect of hard and soft irradiation
• The hard to soft spectral transition in LMXBs - affected by recondensation of gas into an inner disk
• Disk corona interaction: mechanism for the disk truncation and spectrum change in low luminosity AGN
• Application of the Disk Evaporation Model to AGNs
• Low-Luminosity AGN as analogues of Galactic Black Holes in the low/hard state: Evidence from X-ray timing of NGC 4258
• ADAFs, accretion discs and outbursts in compact binaries
• The Spectral Features of Disk and Corona with Mass Evaporation in the Low/Hard State
• Disk-Evaporation Fed Corona: Structure and Evaporation Feature with Magnetic Field
• The disk evaporation model for the spectral features of low-luminosity active galactic nuclei
• The Structure and Spectral Features of a Thin Disk and Evaporation-Fed Corona in High-Luminosity AGNs
• NuSTAR and XMM-Newton observations of the 2015 outburst decay of GX 339-4
• Analytical Model of Disk Evaporation and State Transitions in Accreting Black Holes
• Accretion flows in the hard state of black hole X-ray binaries: the effect of hot gas condensation
• A cool disk in the Galactic Center?
• Accretion with two-phase gas supply and its application in black hole X-ray binaries
• Systematic Analysis of Low/Hard State RXTE Spectra of GX 339-4 to Constrain the Geometry of the System