Circular Polarimetry of Suspect Wind-accreting Magnetic pre-Polars
Pasi Hakala,
Steven G. Parsons,
Thomas R. Marsh
et al.
Abstract:We present results from a circular polarimetric survey of candidate detached magnetic white dwarf -M dwarf binaries obtained using the Nordic Optical Telescope, La Palma. We obtained phase resolved spectropolarimetry and imaging polarimetry of seven systems, five of which show clearly variable circular polarisation. The data indicate that these targets have white dwarfs with magnetic field strengths > 80 MG. Our study reveals that cyclotron emission can dominate the optical luminosity at wavelengths correspond… Show more
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