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Secondary star surface magnetic activity and mass transfer in cataclysmic variables
(University of the Free State, 2005)
In this study it is shown that secondary star magnetic fields influence the mass transfer process in close interacting binaries, especially cataclysmic variables (CVs) and thus play a fundamental role in the whole mass ...
The anomalous low state of the X-ray binary system Hercules X-1
(University of the Free State, 2008)
The lightcurve of Hercules X-1 (Her X-1) shows a peculiar 35-day modulation of the X-ray flux cycling between low and high states. The 35-day modulation is believed to result from the occultation of the neutron star by a ...