Eccentric discs in binaries with intermediate mass ratios: superhumps in the VY Sculptoris stars |
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| Authors: | J. R. Murray,&dagger ,B. Warner, D. T. Wickramasinghe |
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| Affiliation: | The Astrophysical Theory Centre, Australian National University, ACT 0200, Australia;Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa |
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| Abstract: | We investigate the role of the eccentric disc resonance in systems with mass ratios q ≳1/4, and demonstrate the effects that changes in the mass flux from the secondary star have upon the disc radius and structure. The addition of material with low specific angular momentum to the outer edge of a disc restricts that disc radially. Should the mass flux from the secondary be reduced, it is possible for the disc in a system with mass ratio as large as 1/3 to expand to the 3:1 eccentric inner Lindblad resonance and for superhumps to be excited. |
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| Keywords: | accretion, accretion discs hydrodynamics instabilities methods: numerical binaries: close novae, cataclysmic variables |
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