QPOs in Cataclysmic Variables and in X-ray Binaries
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.
Cite
@article{arxiv.astro-ph/0503151,
title = {QPOs in Cataclysmic Variables and in X-ray Binaries},
author = {Wlodek Kluzniak and Jean-Pierre Lasota and Marek A. Abramowicz and Brian Warner},
journal= {arXiv preprint arXiv:astro-ph/0503151},
year = {2009}
}
Comments
Revised version. Astronomy & Astrophysics (Letters), in press