Plasma motion in magnetic close binary systems - Allowance for the curvature of magnetic field lines

Details Plasma motion in magnetic close binary systems - Allowance for the curvature of magnetic field lines Plasma motion in magnetic close binary systems - Allowance for the curvature of magnetic field lines

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64...97a&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Jan.-Feb. 1987, p. 97-107. In Russian.

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Lines Of Force, Magnetic Field Configurations, Plasma Dynamics, White Dwarf Stars, Equations Of Motion, Lagrangian Equilibrium Points, Magnetohydrodynamic Waves, Roche Limit, Stellar Mass Accretion

Scientific paper

The equations of motion are derived for a test particle moving along a magnetic field line in a binary system. The magnetic field is assumed to be dipole in character. It is shown that MHD effects are small corrections to the one-dimensional motion of the accreting clot's mass center along the trajectory between the inner Lagrangian point and the shock wave front or magnetospheric boundary. The asynchronicity of the orbital and rotational motion of the white dwarf leads to the emergence of an additional centrifugal force directed away from the compact star. For accretion to be possible, the streaming plasma must have a velocity which is greater than a certain limiting one. If this criterion is not met, the plasma abandons the system and moves beyond the confines of the magnetosphere. This process leads to synchronization with a characteristic time scale of 1000 yr.

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