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Title:
Magnetically warped discs in close binaries
Authors:
Murray, James R.; Chakrabarty, Dalia; Wynn, Graham A.; Kramer, Louisa
Affiliation:
AA(University of Leicester, University Road, Leicester LE1 7RH), AB(University of Leicester, University Road, Leicester LE1 7RH), AC(University of Leicester, University Road, Leicester LE1 7RH), AD(University of Leicester, University Road, Leicester LE1 7RH)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 335, Issue 2, pp. 247-255. (MNRAS Homepage)
Publication Date:
09/2002
Origin:
MNRAS
Astronomy Keywords:
accretion, accretion discs, hydrodynamics, instabilities, methods: numerical, binaries: close, novae, cataclysmic variables
DOI:
10.1046/j.1365-8711.2002.05628.x
Bibliographic Code:
2002MNRAS.335..247M

Abstract

We demonstrate that measurable vertical structure can be excited in the accretion disc of a close binary system by a dipolar magnetic field centred on the secondary star. We present the first high-resolution hydrodynamic simulations to show the initial development of a uniform warp in a tidally truncated accretion disc. The warp precesses retrogradely with respect to the inertial frame. The amplitude depends on the phase of the warp with respect to the binary frame. A warped disc is the best available explanation for negative superhumps.

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