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QPOs in Cataclysmic Variables and in X-ray Binaries

Wlodek Kluzniak·Jean-Pierre Lasota·Marek A. Abramowicz·Brian Warner
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Abstract

Recent observations, reported by Warner and Woudt, of Dwarf Nova Oscillations (DNOs) exhibiting frequency drift, period doubling, and 1:2:3 harmonic structure, can be understood as disc oscillations that are excited by perturbations at the spin frequency of the white dwarf or of its equatorial layers. Similar quasi-periodic disc oscillations in black hole low-mass X-ray binary (LMXB) transients in a 2:3 frequency ratio show no evidence of frequency drift and correspond to two separate modes of disc oscillation excited by an internal resonance. Just as no effects of general relativity play a role in white dwarf DNOs, no stellar surface or magnetic field effects need be invoked to explain the black hole QPOs.

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Wlodek Kluzniak, Jean-Pierre Lasota, Marek A. Abramowicz, Brian Warner. 2005-07-29. QPOs in Cataclysmic Variables and in X-ray Binaries. https://doi.org/10.1051/0004-6361%3A200500163

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