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- South African Radio Astronomy ObservatoryZA47 papers
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9 papers · 1 filter
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 +…
Dark Matter at the Center and in the Halo of the Galaxy
Neven Bilic, Gary B. Tupper, Raoul D. Viollier
All presently known stellar-dynamical constraints on the size and mass of the supermassive compact dark object at the Galactic center are consistent with a ball of self-gravitating…
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.
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…
AGB Variables as Distance Indicators
Michael Feast
Evidence for the existence of Mira Period-Luminosity relations is reviewed including recent work on Miras with thick circumstellar shells. The calibration of the relation at K is d…
A lower semicontinuity result for some integral functionals in the space SBD
Francois Ebobisse
The purpose of this paper is to study the lower semicontinuity with respect to the strong -convergence, of some integral functionals defined in the space SBD of special functi…