Paper:	Hot DQ Pulsator or Magnetic White Dwarf Binary?
Volume:	469, 18th European White Dwarf Workshop (EUROWD12)
Page:	9
Authors:	Dunlap, B. H.; Barlow, B. N.; Clemens, J. C.
Abstract:	We present spectroscopic and photometric observations of a suspected hot carbon atmosphere (hot DQ) white dwarf which has a large-amplitude optical and ultraviolet brightness variation with a period of 84 min. Our observations show that it is not a hot DQ but instead a magnetic DA, and an observed infrared excess and periods of significantly increased luminosity suggest that it might be a polar currently in a low state. We also discuss whether the variability of the hot DQ variable stars might arise from a similar mechanism.

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