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Hydrodynamic Models of Line-Driven Accretion Disk Winds III: Local Ionization EquilibriumWe present time-dependent numerical hydrodynamic models of line-driven accretion disk winds in cataclysmic variable systems and calculate wind mass-loss rates and terminal velocities. The models are 2.5-dimensional, include an energy balance condition with radiative heating and cooling processes, and includes local ionization equilibrium introducing time dependence and spatial dependence on the line radiation force parameters. The radiation field is assumed to originate in an optically thick accretion disk. Wind ion populations are calculated under the assumption that local ionization equilibrium is determined by photoionization and radiative recombination, similar to a photoionized nebula. We find a steady wind flowing from the accretion disk. Radiative heating tends to maintain the temperature in the higher density wind regions near the disk surface, rather than cooling adiabatically. For a disk luminosity L (sub disk) = solar luminosity, white dwarf mass M(sub wd) = 0.6 solar mass, and white dwarf radii R(sub wd) = 0.01 solar radius, we obtain a wind mass-loss rate of M(sub wind) = 4 x 10(exp -12) solar mass yr(exp -1) and a terminal velocity of approximately 3000 km per second. These results confirm the general velocity and density structures found in our earlier constant ionization equilibrium adiabatic CV wind models. Further we establish here 2.5D numerical models that can be extended to QSO/AGN winds where the local ionization equilibrium will play a crucial role in the overall dynamics.
Document ID
20020080799
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Pereyra, Nicolas Antonio (Pittsburgh Univ. Pittsburgh, PA United States)
Kallman, Timothy R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
White, Nicholas E.
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NSF AST-00-71193
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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