Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..891k&link_type=abstract
Astronomy and Astrophysics, v.366, p.891-897 (2001)
Astronomy and Astrophysics
Astrophysics
9
Stars: Individual: V709 Cas, Stars: Novae, Cataclysmic Variables, Stars: Oscillations
Scientific paper
We report detection of low-amplitude optical oscillations at periods of 312.77 s and 317.94 s of the intermediate polar V709 Cas. Within the accuracy of measurement these periods agree with the X-ray period reported by Motch et al. (\cite{motch}) and refined by Norton et al. (\cite{norton}) and its synodic counterpart if we specify an orbital period of 5.4 h, which is one of the two possible orbital periods reported by Motch et al. (\cite{motch}). The oscillation at a period of 317.94 s has the strong first harmonic which is evidence for the nonsinusoidal pulse profile of this oscillation. The data folded at a period of 317.94 s reveal a double-peaked pulse profile of this oscillation, which is highly variable from night to night. A weak periodic signal corresponding to the first harmonic of the oscillation at a period of 312.77 s is also detected in the lightcurves of V709 Cas.
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