Discovery of Nonradial Pulsations in PQ Andromedae

Discovery of Nonradial Pulsations in PQ Andromedae

We have detected pulsations in time‐series photometry of the WZ Sge dwarf nova PQ Andromedae. 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 nonradial pulsations. There is no i...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 2005-09, Vol.117 (835), p.928-930
Hauptverfasser: Vanlandingham, Karen M., Schwarz, Greg J., Howell, Steve B.
Format: Artikel
Sprache:eng
Schlagworte:
Acoustic spectra
Astronomical magnitude
Light curves
Nonradial pulsations
Optical bursts
Optics
Radial velocity
White dwarfs
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Zusammenfassung:We have detected pulsations in time‐series photometry of the WZ Sge dwarf nova PQ Andromedae. 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 nonradial pulsations. There is no indication in the photometry of an approximately 1.7 hr orbital period, as reported in previous spectroscopic observations.
ISSN:0004-6280
1538-3873
DOI:10.1086/432456