A Numerical Model for Accretion in Intermediate Polars with Dipolar Magnetic Fields

Abstract

A three-dimensional numerical model for an accretion process investigation in the magnetosphere of a white dwarf in magnetic cataclysmic variables is developed. The model assumes that the white dwarf has a dipole magnetic field with its symmetry axis inclined to the rotation axis. The model is based on the equations of modified MHD, that describe the mean flow parameters in the wave MHD turbulence. Diffusion of the magnetic field and radiative heating and cooling are taken into account. The suitability of the model is confirmed by modeling the accretion in a typical intermediate polar. The computations show that a magnetosphere forms around the accretor, with the accretion occurring via columns. The accretion columns have a curtain-like shape, and arc-shaped zones of energy release form on the surface of the white dwarf in the magnetic poles area as a result of the matter infall.

10 pages, 4 figures

References in corpus (5)

• Accretion to Stars with Non-dipole Magnetic Fields
• Three-dimensional Simulations of Accretion to Stars with Complex Magnetic Fields
• Full 3-D MHD calculations of accretion flow Structure in magnetic cataclysmic variable stars with strong and complex magnetic fields
• Magnetic-Field Structure in the Accretion Disks of Semi-Detached Binary Systems
• Formation of Accretion Disks in Close-Binary Systems with Magnetic Fields

Cited by in corpus (2)

• Features of the Accretion in the EX Hydrae System: Results of Numerical Simulation
• Features of the Flow Structure in the Vicinity of the Inner Lagrangian Point in Polars