Theory of Accretion Disks

With the advent of space observatories and modern developments in ground based astronomy and concurrent progress in the theoretical understanding of these observations it has become clear that accretion of material on to compact objects is an ubiquitous mechanism powering very diverse astrophysical sources ranging in size and luminosity by many orders of magnitude. A problem common to these systems is that the material accreted must in general get rid of its angular momentum and this leads to the formation of an Accretion Disk which allows angular momentum re-distribution and converts potential energy into radiation with an efficiency which can be higher than the nuclear burning yield. These systems range in size from quasars and active galactic nuclei to accretion disks around forming stars and the early solar system and to compact binaries such as cataclysmic variables and low-mass X-ray binaries. Other objects that should be mentioned in this context are 88433, the black hole binary candidates, and possibly gamma-ray burst sources. Observations of these systems have provided important constraints for theoretical accretion disk models on widely differing scales, lumi nosities, mass-transfer rates and physical environments.

Proceedings of the NATO Advanced Research Workshop, Garching, Germany, March 6-10, 1989

Autorentext
Wolfgang J. Duschl ist Professor des Instituts für Theoretische Physik und Astrophysik (Abteilung Astrophysik) der Christian-Albrechts-Universität zu Kiel.

Klappentext

With the advent of space observatories and modern developments in ground­ based astronomy and concurrent progress in the theoretical understanding of these observations it has become clear that accretion of material on to compact objects is an ubiquitous mechanism powering very diverse astrophysical sources ranging in size and luminosity by many orders of magnitude. A problem common to these systems is that the material accreted must in general get rid of its angular momentum and this leads to the formation of an Accretion Disk which allows angular momentum re-distribution and converts potential energy into radiation with an efficiency which can be higher than the nuclear burning yield. These systems range in size from quasars and active galactic nuclei to accretion disks around forming stars and the early solar system and to compact binaries such as cataclysmic variables and low-mass X-ray binaries. Other objects that should be mentioned in this context are 88433, the black hole binary candidates, and possibly gamma-ray burst sources. Observations of these systems have provided important constraints for theoretical accretion disk models on widely differing scales, lumi­ nosities, mass-transfer rates and physical environments.

Inhalt
Conference Photograph.- Preface.- List of Participants.- Welcoming Address.- Observational Evidence for Accretion Disks in Galactic Nuclei.- The Low-Frequency Spectra of Accretion Disks in Active Galactic Nuclei: The Dark Side of the Big Blue Bump.- Observational Constraints on Viscosity in the AGN Accretion Discs.- Accretion Disk Magnetohydrodynamics and the Origin of Jets.- Formation of Relativistic MHD Jets in the Magnetosphere of Accretion Disks.- Nonsteady MHD Jets from Magnetized Accretion Disks - Sweeping-Magnetic-Twist Mechanism -.- Statistical Modelling of IR/UV Spectra in AGN.- Formation and Evolution of the Solar Nebula.- Angular Momentum Transport in Protostellar Disks.- Protostellar Discs.- Formation of Viscous Protostellar Accretion Disks.- Formation and Structure of Protostellar Accretion Disks.- Merging White Dwarfs, Disk Formation and Type I Super-Novae.- Variability of Active Galactic Nuclei and Galactic QPO Sources: A Diagnosis.- Nonlinear Pulsation in the Transonic Region of Geometrically Thin Accretion Disks.- One-Armed Oscillations Of Disks and Their Applications.- Thermal and Tidal Instabilities in Accretion Disks of Dwarf Novae.- Hydrodynamic Simulation of Accretion Disks in Cataclysmic Variables.- Simulations of Accretion Flow in Close Binary Stars.- Viscous Evolution of Accretion Discs in the Quiescence of Dwarf Novae.- Black Hole Accretion Disc Instability and Soft X-Ray Transients.- Non-Axisymmetric Shear Instabilities in Thick Accretion Disks.- Instabilities of Accretion Flows Caused by the Interaction of Internal Gravity Modes.- Simulations of Three-Dimensional Slender Tori.- Accretion Disks in Low Mass X-Ray Binaries.- Reflected Accretion Disk Emission Lines in Cataclysmic Variables.- The Structure of the Boundary Layer of Accretion Disks in Cataclysmic Binaries.- The Dynamics of Twisted Accretion Discs.- A Free Accretion Disk in Sn 1987A?.- The Spectra of Relativistic Accretion Disks.- The Compact Object in SS433: Neutron Star or Black Hole?.- Physics of Accretion by Spiral Shock Waves.- Spiral Shocks in Accretion Disks: A Preliminary Numerical Study.- Mass Transfer by Tidally Induced Spiral Shocks in an Accretion Disc.- Accretion Disks and the Link Between an AGN and its Host Galaxy.- Large-Scale Accretion Flows in AGN.- The Disk Accretion of a Tidally Disrupted Star onto a Massive Black Hole.- Line Radiation from Stationary Accretion Disks.- Continuum Spectra of Accretion Discs.- Influence of Radiative Transfer on the Vertical Structure of Accretion Disks.- Dusty Disks and the Infrared Emission from AGN.