Superhumps: Confronting Theory with Observation
arXiv:astro-ph/0605743 · doi:10.1111/j.1365-2966.2006.10631.x
Abstract
We review the theory and observations related to the ``superhump'' precession of eccentric accretion discs in close binary sytems. We agree with earlier work, although for different reasons, that the discrepancy between observation and dynamical theory implies that the effect of pressure in the disc cannot be neglected. We extend earlier work that investigates this effect to include the correct expression for the radius at which resonant orbits occur. Using analytic expressions for the accretion disc structure, we derive a relationship between the period excess and mass-ratio with the pressure effects included. This is compared to the observed data, recently derived results for detailed integration of the disc equations and the equivalent empirically derived relations and used to predict values for the mass ratio based on measured values of the period excess for 88 systems.
11 pages, 7 figures, 4 tables, accepted for publication in MNRAS
References in corpus (10)
- Catalogue of cataclysmic binaries, low-mass X-ray binaries and related objects (Seventh edition)
- Superhumps in Cataclysmic Binaries. XXV. q_crit, epsilon(q), and Mass-Radius
- The dynamics of eccentric accretion discs in superhump systems
- Detection of superhumps in XTE J1118+480 approaching quiescence
- The precession of eccentric discs in close binaries
- A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen
- ULTRACAM photometry of the eclipsing cataclysmic variables XZ Eri and DV UMa
- Thermal stability and nova cycles in permanent superhump systems
- Eccentric discs in binaries with intermediate mass ratios: Superhumps in the VY Sculptoris stars
- Superhumps, Magnetic Fields and the Mass-ratio in AM Canum Venaticorum
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- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)
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- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IX: The Ninth Year (2016-2017)
- TESS light curves of cataclysmic variables -- II: Superhumps in old novae and novalike variables
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