Synchronization of magnetic stars in binary systems

Details Synchronization of magnetic stars in binary systems Synchronization of magnetic stars in binary systems

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...274l..71l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 274, Nov. 15, 1983, p. L71-L75. Research supported

Astronomy and Astrophysics

Astrophysics

53

Astrophysics, Binary Stars, Magnetic Stars, Synchronism, Energy Dissipation, Field Aligned Currents, Magnetohydrodynamics, Stellar Rotation, Torque, White Dwarf Stars

Scientific paper

Asynchronous rotation of magnetic stars in close binary systems drives substantial field-aligned electrical currents between the magnetic star and its companion. The resulting magnetohydrodynamic torque is able to account for the heretofore unexplained synchronous rotation of the strongly magnetic degenerate dwarf component in systems like AM Her, VV Pup, AN UMa, and EF Eri as well as the magnetic A type component in systems like HD 98088 and 41 Tauri. The electric fields produced by even a small asynchronism are large and may accelerate some electrons to high energies, producing radio emission. The total energy dissipation rate in systems with degenerate dwarf spin periods as short as 1 minute may reach 10 to the 33rd ergs/s. Total luminosities of this order may be a characteristic feature of such systems.

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