Analytic Model for Advection-Dominated Accretion Flows in a Global Magnetic Field

Abstract

A model for advection-dominated accretion flows (ADAFs) in a global magnetic field is proposed. In contrast to the well known ADAF models in which the viscosity of a fluid determines both angular momentum transfer and energy dissipation in the flow, the magnetic field and the electric resistivity, respectively, control them in this model. A manageable set of analytic solutions for the flow and the magnetic field is obtained to vertically non-integrated basic equations. This set describes mathematically a fully advective accretion flow and, in physically plausible situations for most AGNs, it is also confirmed that the radiation cooling estimated on this solution is really negligible compared with the internal energy of the flow.

27pages, 1 figure, to appear in ApJ vol 529, Feb.1, 2000

Cited by in corpus (22)

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• Self-Similar Solutions of Viscous-Resistive ADAFs With Poloidal Magnetic Fields
• A Model for Quasi-Spherical Magnetized Accretion Flow
• Self-similar structure of the magnetized radiation-dominated accretion disks
• Hydrodynamical wind on vertically self-gravitating ADAFs in the presence of toroidal magnetic field
• Self-similar structure of magnetized ADAFs and CDAFs
• Radiation Spectra from Advection-Dominated Accretion Flows in a Global Magnetic Field
• Radiation Spectrum of a Magnetized Supercritical Accretion Disc with Thermal Conduction
• A class of self-gravitating, magnetized accretion disks
• Criterion for Generation of Winds from Magnetized Accretion Disks
• What Kinds of Accretion Disks Are There in the Nuclei of Radio Galaxies?
• Structure of ADAFs in a general large-Scale B-field: The role of wind and thermal conduction
• Viscosity-Driven Winds from Magnetized Accretion Disks
• Scale-Free Thin Discs with an Isopedic Magnetic Field
• Two Types of Magnetohydrodynamic Sheath Jets
• Time dependence of advection dominated accretion flow around a rotating compact object
• Self-similar Evolutionary Solutions for Accreting Magneto-fluid around a Compact Object with Finite Electrical Conductivity
• Appearance of Jet-Driving Poynting Flux in Hot, Tenuous Accretion Disks Threaded by an Ordered Magnetic Field
• Self-Similar Solutions for Viscous and Resistive ADAF
• Global Operation of Resistive, Radiation-Inefficient, Accretion Flows in Preparing Jet-Driving Circumstances