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arXiv · 1802.02636

Discovery of a magnetic white dwarf with unusual short-period variability

Aleks Scholz·Joe Llama·Koraljka Muzic·Sarah Faller·Dirk Froebrich·Beate Stelzer
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Abstract

We report the discovery of a magnetic white dwarf which shows periodic variability with P=110 min, color-dependent amplitudes and a transient phase shift in the blue compared to the red lightcurve - a previously unknown type of variability for this type of object. We attribute the variations either to a close ultracool (thus far undetected) companion or, more likely, to magnetic spots with unusual temperature structure.

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Aleks Scholz, Joe Llama, Koraljka Muzic, Sarah Faller, Dirk Froebrich, Beate Stelzer. 2018-02-07. Discovery of a magnetic white dwarf with unusual short-period variability. https://arxiv.org/abs/1802.02636

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