Disc-Magnetosphere interactions in Cataclysmic Variable Stars
arXiv:0712.2520 · doi:10.1017/S1743921307009684
Abstract
I review, from an observational perspective, the interactions of accretion discs with magnetic fields in cataclysmic variable stars. I start with systems where the accretion flows via a stream, and discuss the circumstances in which the stream forms into an accretion disc, pointing to stars which are close to this transition. I then turn to disc-fed systems and discuss what we know about how material threads on to field lines, as deduced from the pattern of accretion footprints on the white dwarf. I discuss whether distortions of the field lines are related to accretion torques and the changing spin periods of the white dwarfs. I also review the effect on the disc-magnetosphere interaction of disc-instability outbursts. Lastly, I discuss the temporary, dynamo-driven magnetospheres thought to occur in dwarf-nova outbursts, and whether slow-moving waves are excited at the inner edges of the disc.
Invited review at IAU Symp. 243 (12 pages)
References in corpus (30)
- The disc instability model of dwarf-novae and low-mass X-ray binary transients
- The spin periods and magnetic moments of white dwarfs in magnetic cataclysmic variables
- Rapid Oscillations in Cataclysmic Variables
- Dwarf Nova Oscillations and Quasi-Periodic Oscillations in Cataclysmic Variables: II. A Low Inertia Magnetic Accretor Model
- The energy balance in polars revisited
- Dwarf Nova Oscillations and Quasi-Periodic Oscillations in Cataclysmic Variables: III. A New Kind of Dwarf Nova Oscillation, and Further Examples of the Similarities to X-Ray Binaries
- Why do some intermediate polars show soft X-ray emission? A survey of XMM-Newton spectra
- The size of the accretion region in intermediate polars: eclipses of XY Arietis observed with RXTE
- An outburst of the magnetic cataclysmic variable XY Arietis observed with RXTE
- Outbursts of EX Hydrae: mass-transfer events or disc instabilities?
- Evidence of Precession of the White Dwarf in Cataclysmic Variables
- Dwarf Nova Oscillations and Quasi-Periodic Oscillations in Cataclysmic Variables: I. Observations of VW Hyi
- The accretion flow in the discless intermediate polar V2400 Ophiuchi
- Dwarf nova oscillations and quasi-periodic oscillations in cataclysmic variables -- V. Results from an extensive survey
- Solving the kilo-second QPO problem of the intermediate polar GK Persei
- Simultaneous optical polarimetry and X-ray data of the near synchronous polar RX J2115-5840
- Why does the intermediate polar V405 Aurigae show a double-peaked spin pulse?
- Twisted accretion curtains in the intermediate polar FO Aquarii
- XMM-Newton observations of the complex spin pulse of the intermediate polar PQ~Geminorum
- On the magnetic accretor GK Persei in outburst
- Dwarf Nova-like Outburst of Short Period Intermediate Polar HT Camelopardalis
- A double-frequency dwarf nova oscillation
- XMM-Newton observations of the asynchronous polar BY Cam
- On the accretion mode of the intermediate polar V1025 Centauri
- FS Aur - a new class of Cataclysmic Variables or the missing link between Intermediate Polars and SW Sex objects?
- Spectroscopic Observations of the Intermediate Polar EX Hydrae in Quiescence
- Dwarf Nova Oscillations and Quasi-Periodic Oscillations in Cataclysmic Variables, IV. Observations of Frequency Doubling and Tripling in VW Hyi
- Simultaneous X-ray and Optical Observations of EX Hydrae
- HT Camelopardalis: The simplest intermediate polar spin pulse
- Stream-field interactions in the magnetic accretor AO Piscium