Discovery of Non-radial pulsations in PQ Andromedae

Abstract

We have detected pulsations in time-series photometry of the WZ Sge dwarf nova PQ And. The strongest peak in the power spectrum occurs at a period of 10.5 minutes. Similar periods have been observed in other WZ Sge systems and are attributed to ZZ Ceti type non-radial pulsations. There is no indication in the photometry of an approximately 1.7 hour orbital period as reported in previous spectroscopic observations.

arXiv comment7 pages, 5 figures

References in corpus (6)

• On the Purity of the ZZ Ceti Instability Strip: Discovery of More Pulsating DA White Dwarfs on the Basis of Optical Spectroscopy
• HS2331+3905: The cataclysmic variable that has it all
• The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae
• SDSS J161033.64-010223.3: A second Cataclysmic Variable with a Non-radially Pulsating Primary
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• A ZZ Ceti white dwarf in SDSS J133941.11+484727.5
• X-ray Luminosities of Optically-Selected Cataclysmic Variables and Application to the Galactic Ridge X-ray Emission
• Finding the Instability Strip for Accreting Pulsating White Dwarfs from HST and Optical Observations
• Discovery of two new accreting pulsating white dwarf stars
• HST and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables
• Multi-site Observations of Pulsation in the Accreting White Dwarf SDSS J161033.64-010223.3 (V386 Ser)
• R-mode oscillations in accreting white dwarfs in cataclysmic variables
• NGTS and HST insights into the long period modulation in GW Librae