High-frequency QPOs as a problem in physics: non-linear resonance
Astrophysics
2012-08-13 v1
Abstract
The presence of a kHz frequency in LMXBs has been expected from scaling laws, by analogy with the QPO phenomenon in HMXB X-ray pulsars. Interpretation of the two kHz frequencies, observed in accreting neutron stars, in terms of non-linear resonance in strong-field gravity led to the prediction of twin QPOs in black hole systems, in a definite frequency ratio (such as 2/3). The imprint of a subharmonic of the 401 Hz rotation rate in the frequencies of the QPOs detected in the accreting millisecond pulsar is at once a signature of non-linear resonance and of coupling between accretion disk modes and the neutron star spin.
Cite
@article{arxiv.astro-ph/0402013,
title = {High-frequency QPOs as a problem in physics: non-linear resonance},
author = {Wlodek Kluzniak and Marek A. Abramowicz and William H. Lee},
journal= {arXiv preprint arXiv:astro-ph/0402013},
year = {2012}
}
Comments
presented at X-ray Timing 2003: Rossi and Beyond, Boston, November 2003