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Rapid Oscillations in Cataclysmic Variables
Brian Warner
I give an overview of the rich phenomenology of dwarf nova oscillations (DNOs) and Quasi-periodic Oscillations (QPOs) observed in cataclysmic variable stars (CVs). The favoured int…
SDSS J161033.64-010223.3: A second Cataclysmic Variable with a Non-radially Pulsating Primary
Patrick A. Woudt, Brian Warner
We find from high speed photometry of the Sloan Digital Survey cataclysmic variable candidate SDSS J161033.64-010223.3 that it has a double humped modulation, which is probably orb…
AM CVn stars in the UCT CCD CV survey
Patrick A. Woudt, Brian Warner
High speed photometry of the helium-transferring binary ES Cet - taken over a two-year period (2001 October - 2003 October) - shows a very stable photometric period of 620.211437 +…
Accretion in Cataclysmic Variable stars
Brian Warner, Patrick A. Woudt
We consider accretion onto the white dwarfs in cataclysmic variables in relation to nova eruptions, dwarf nova outbursts, hibernation and non-radial oscillations.
Intermediate polars in low states
Brian Warner
Although no intermediate polar (IP) has been observed in recent years to descend into a state of low rate of mass transfer, there are candidate stars that appear to be already in i…
Pulsating White Dwarfs in Cataclysmic Variables: The Marriage of ZZ Cet and Dwarf Nova
Brian Warner, Patrick A. Woudt
There are now four dwarf novae known with white dwarf primaries that show large amplitude non-radial oscillations of the kind seen in ZZ Cet stars. We compare the properties of the…
The new AM CVn star in Hydra
Patrick A. Woudt, Brian Warner
High speed photometry of the new AM CVn star in Hya (previously known as SN2003aw), spectroscopically identified by Chornock & Filippenko, shows it to have a superhump period of 20…
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
Brian Warner, Patrick A. Woudt, Magaretha L. Pretorius
We present measurements of the periods of Dwarf Nova Oscillations (DNOs) and Quasi-Periodic Oscillations (QPOs) in Cataclysmic Variable stars (CVs), many culled from published lite…
High-speed photometry of the Recurrent Nova IM Normae
Patrick A. Woudt, Brian Warner
The recurrent nova IM Nor is found to have an orbital period of 2.462 h, shown by periodic dips in brightness. This is only the second recurrent nova known to have such a short per…
Magnetic CVs in the UCT CCD CV Survey
Patrick A. Woudt, Brian Warner
An overview is given of all the magnetic CVs found in the UCT CCD CV Survey (Woudt & Warner 2001, 2002, 2003a). We have identified eight new candidate Intermediate Polars (IP), of…
RX J0944.5+0357: A Probable Intermediate Polar
Patrick A. Woudt, Brian Warner
From optical photometry the cataclysmic variable RX J0944.5+0357 is shown to have a double-peaked pulse profile with a period of ~2160 s. The two peaks vary rapidly in relative amp…
High speed photometry of faint Cataclysmic Variables: III. V842 Cen, BY Cir, DD Cir, TV Crv, V655 CrA, CP Cru, V794 Oph, V992 Sco, EU Sct and V373 Sct
Patrick A. Woudt, Brian Warner
We present further results from a high speed photometric survey of faint cataclysmic variables. We find that V842 Cen (Nova Cen 1986 No. 2) is highly active, but with no evident or…
Dwarf Nova Oscillations and Quasi-Periodic Oscillations: Extension of the Two-QPO Diagram of X-Ray Binaries, and a new kind of DNO
Brian Warner, Patrick A. Woudt
Seventeen examples are given of Cataclysmic Variable (CV) stars possessing both Dwarf Nova Oscillations (DNOs) and Quasi-Periodic Oscillations (QPOs). These form an extension of th…