The physics of kHz QPOs---strong gravity's coupled anharmonic oscillators
Astrophysics
2016-08-30 v1
Abstract
We explain the origin of the puzzling high frequency peaks (QPOs) in the variability power spectra of accreting neutron stars and black holes as a non-linear 1:2 or 1:3 resonance between orbital and radial epicyclic motion. These resonances are present because the gravitational field deviates strongly from a Newtonian 1/r potential. Our theory agrees with the recently reported observations of two QPOs, at 300 Hz and 450 Hz, in the black hole candidate GRO J1655-40.
Cite
@article{arxiv.astro-ph/0105057,
title = {The physics of kHz QPOs---strong gravity's coupled anharmonic oscillators},
author = {Wlodek Kluzniak and Marek Artur Abramowicz},
journal= {arXiv preprint arXiv:astro-ph/0105057},
year = {2016}
}