71 citations · 355 across the 14 of their papers we have counts for
14 papers
Surface brightness inhomogeneity on the helium-rich hot subdwarf in the X-ray binary HD 49798
C. Simon Jeffery, Gavin Ramsay
HD 49798 is an X-ray binary consisting of a hot helium-rich subdwarf primary and an accreting compact companion with an orbital period of 1.55 d. TESS observations of its optical l…
Circular polarimetry of suspect wind-accreting pre-polars II
Pasi Hakala, Steven Parsons, Gavin Ramsay +2
The origin of white dwarf magnetic fields is an open question. Furthermore, such fields play a vital role in the evolution of interacting binary stars. Here we present a study of w…
XMM-Newton observations of the eclipsing polar V2301 Oph
Gavin Ramsay, Mark Cropper
We present XMM-Newton observations of the eclipsing polar V2301 Oph which cover nearly 2.5 binary orbital cycles and 2 eclipses. This polar is believed to have the lowest magnetic…
X-ray emissions from two-temperature accretion flows within a dipole magnetic funnel
Curtis J. Saxton, Kinwah Wu, Joao. B. G. Canalle +2
We investigate the hydrodynamics of accretion channelled by a dipolar magnetic field (funnel flows). We consider situations in which the electrons and ions in the flow cannot maint…
Twisted accretion curtains in the intermediate polar FO Aquarii
P. A. Evans, Coel Hellier, Gavin Ramsay +1
We report on a ~37-ks XMM-Newton observation of the intermediate polar FO Aquarii, presenting X-ray and UV data from the EPIC and OM cameras. We find that the system has changed fr…
Accretion Flow Along a Dipolar Field: Application to Intermediate Polars
J. B. G. Canalle, Kinwah Wu, Mark Cropper +2
A hydrodynamic formulation for accretion flow channeled by a dipolar magnetic field is constructed using a curvi-linear coordinate system natural to the field structure. We solve t…