On the inclination and binarity of the pulsating pre-white dwarf PG 2131+066

Details On the inclination and binarity of the pulsating pre-white dwarf PG 2131+066 On the inclination and binarity of the pulsating pre-white dwarf PG 2131+066

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...331..162p&link_type=abstract

Astronomy and Astrophysics, v.331, p.162-166 (1998)

Astronomy and Astrophysics

Astrophysics

5

Stars: Binaries: Close, Oscillations, White Dwarfs, Individual: Pg 2131+066

Scientific paper

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. Based on observations obtained at the German-Spanish Astronomical Center, Calar Alto, operated by the Max Planck Institut für Astronomie Heidelberg jointly with the Spanish National Commission for Astronomy.

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