1998A&A...331..162P

We report on new spectroscopic data as well as recent results from a temporal analysis of PG 2131+066 WET time series, yielding a new interpretation of the binarity nature for PG 2131+066. The newly discovered Hα emission features, the estimated low inclination and the found 3.9h period, support the picture of a close binary system, composed of the nonradial oscillating white dwarf with a cool red dwarf companion. Since the spin and the orbital period are not yet synchronized and because PG 2131+066 has no X-ray counterpart, we classify it as a progenitor of a cataclysmic variable.