Pulsation in the white dwarf HE 1017−1352: confirmation of the class of hot DAV stars

  title={Pulsation in the white dwarf HE 1017−1352: confirmation of the class of hot DAV stars},
  author={Alejandra D. Romero and L Antunes Amaral and S. O. Kepler and L Fraga and Donald W. Kurtz and Hiromoto Shibahashi},
  journal={Monthly Notices of the Royal Astronomical Society},
We report the detection of periodic variations on the $T_\mathrm{eff}\simeq 32\, 000$ K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights for a total of 16.8 h. From the frequency analysis, we found four periods of 605, 556, 508, and 869 s with significant amplitudes above the 1/1000 false alarm probability detection limit. The detected modes are compatible with low harmonic degree g-mode non… 
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