The Magnetic Cataclysmic Variables
New Observations of Accretion Phenomena in Magnetic Cataclysmic Variables
... 2 Southern African Large Telescope, Box 9, Observatory 7935, Cape Town, South Africa 3 Department of Astronomy, University of Cape Town, Rondebosch 7770, Cape Town, South Africa Abstract. We present an overview of the ...
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White dwarf masses in magnetic cataclysmic variables: Multi-temperature fits to Ginga data
... One method of obtaining the mass of the white dwarf in magnetic cataclysmic variables (mCVs) is through their hard X-ray spectra. However, previous mass estimates using this method give lower limits ...
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First XMM-Newton observations of strongly magnetic cataclysmic variables - II. Timing studies of DP Leo and WW Hor
... stars: magnetic fields – novae, cataclysmic variables – X-rays: ...of magnetic cataclysmic variables also referred to as polars because of their strongly polarized optical ...
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SwiftJ0525.6+2416 and IGRJ04571+4527: two new hard X-ray-selected magnetic cataclysmic variables identified with XMM-Newton
... IGR J04571 + 4527 and Swift J0525.6 + 2416 are two hard X-ray sources detected in the Swift/BAT and INTEGRAL/IBIS surveys. They were proposed to be magnetic cataclysmic variables of the intermediate ...
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A multiwavelenght study of the accretion region in magnetic cataclysmic variables
... w hen th e m agnetic field lines feeding the accretion region cross our line of. sight[r] ...
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Multi-wavelength studies of non-magnetic cataclysmic variables
... As the secondary star expands beyond its Roche lobe, mass will be transferred into the Roche lobe of the primary via L \, the inner Lagrangian point. In a CV the binary system is semi-detached; the secondary fills its ...
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Features of the mass transfer in magnetic cataclysmic variables with fast-rotating white dwarfs
... rotating magnetic field ...rotating magnetic dipole (9), (10) is determined by the magnetic moment m at a retarded time t 0 = t − ...the magnetic field lines rotate not like a solid ...the ...
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The Magnetospheric Boundary in Cataclysmic Variables
... in Cataclysmic Variables Coel Hellier Astrophysics Group, Keele University, Keele, ...The magnetic cataclysmic variables (MCVs) present a wealth of observational diagnostics for ...
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White Dwarfs in Cataclysmic Variables: An Update
... Abstract In this review, we summarize what is currently known about the surface temperatures of accreting white dwarfs in non- magnetic and magnetic cataclysmic variables (CVs) based upon ...
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X ray observations of cataclysmic variables
... 1.4.1 Dwarf Nova Classification Non-magnetic cataclysmic variables are divided into several sub-classes due to the differing properties they exhibit. Many of their properties are based on their ...
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The X ray properties of the magnetic cataclysmic variable UUColumbae
... Results. The complex X-ray and UV/optical temporal behaviour indicates that accretion occurs predominantly (∼80%) via a disc with a partial contribution (∼20%) directly from the stream. The main accreting pole dominates ...
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The evolution of cataclysmic variables
... thus potentially introducing an observational bias. Nonetheless, the mere existence of cold CV white dwarfs at these long orbital periods is clearly in contrast with the currently available models of CV evolution. ...
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Roche tomography of cataclysmic variables - VII. The long-term magnetic activity of AE Aqr
... the magnetic activity of single stars and detached bina- ries is reasonably well studied, studies of magnetic activity cycles on interacting binaries are critically ...lacking. Cataclysmic ...
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Nova-like cataclysmic variables in the infrared
... We report here on our Spitzer observations of a sample of 11 additional NLs. These observations were obtained in order to study the general properties of CVs in the mid-IR; NLs were selected as targets to ensure the ...
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Imaging the secondary stars in cataclysmic variables
... for magnetic activ- ity in CVs – magnetic activity cycles have been invoked to explain variations in the orbital periods, mean brightnesses and mean intervals between outbursts in CVs (see ...The ...
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X-rays from Cataclysmic Variables
... The narrow dip is due to absorption in the transient accretion stream, which becomes X-rayed when it has just left the orbital plane. It can be observed in systems in which the orbital inclination exceeds the co-latitude ...
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X-RAY SPECTROSCOPY OF CATACLYSMIC VARIABLES
... CONCLUSIONS SO FAR AND FUTURE PROSPECTS The Aizu shock model attempts to connect the optically thick region immediately below the shock to the extremely optically thick white dwarf atmosphere. With hindsight, it is ...
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On the evolutionary status of short-period cataclysmic variables
... Is the presence of starspots on these cool donors a real- istic assumption? Starspots are formed when energy trans- port by convection is inhibited by the local magnetic field. Thus, the stellar material must be ...
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K band spectroscopy of pre cataclysmic variables
... The progenitors of CVs are thought to be initially wide, de- tached binaries. As the more massive component expands in the course of its nuclear evolution, it fills its Roche lobe and trans- fers matter at high rates ...
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A magnetic accretion switch in pre cataclysmic binaries
... 1 I N T R O D U C T I O N Short-period binaries composed of a white dwarf and late-type star are of fundamental importance to astrophysics and are the progeni- tors of cataclysmic variables (CVs) and novae, ...
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