Magnetically warped discs in close binaries

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.

11 pages, 10 figures, MNRAS accepted

References in corpus (2)

• Precessing warped accretion discs in X-ray binaries
• Late superhumps and the stream-disc impact in IY UMa

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