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Long-term eclipse timing of white dwarf binaries: an observational hint of a magnetic mechanism at work
M. C. P. Bours, T. R. Marsh, S. G. Parsons +18
We present a long-term programme for timing the eclipses of white dwarfs in close binaries to measure apparent and/or real variations in their orbital periods. Our programme includ…
An irradiated brown-dwarf companion to an accreting white dwarf
Juan V. Hernández Santisteban, Christian Knigge, Stuart P. Littlefair +7
Brown dwarfs and giant planets orbiting close to a host star are subjected to significant irradiation that can modify the properties of their atmospheres. In order to test the atmo…
The Detection of Dust around NN Ser
Adam Hardy, Matthias R. Schreiber, Steven G. Parsons +6
Eclipse timing variations observed from the post common-envelope binary (PCEB) NN Ser offer strong evidence in favour of circumbinary planets existing around PCEBs. If real, these…
Precision Ephemerides For Gravitational Wave Searches: II. Cyg X-2
Sammanani S. Premachandra, Duncan K. Galloway, Jorge Casares +2
Accreting neutron stars in low-mass X-ray binaries (LMXBs) are candidate high-frequency persistent gravitational wave sources. These may be detectable with next generation interfer…
GW Librae: A unique laboratory for pulsations in an accreting white dwarf
O. Toloza, B. T. Gaensicke, J. J. Hermes +22
Non-radial pulsations have been identified in a number of accreting white dwarfs in cataclysmic variables. These stars offer insight into the excitation of pulsation modes in atmos…
Kepler K2 Observations of the Intermediate Polar FO Aquarii
M. R. Kennedy, P. Garnavich, E. Breedt +5
We present photometry of the intermediate polar FO Aquarii obtained as part of the K2 mission using the Kepler space telescope. The amplitude spectrum of the data confirms the orbi…