Warping modes in discs around accreting neutron stars
High Energy Astrophysical Phenomena
2015-05-13 v1
Abstract
The origin and stability of a thin sheet of plasma in the magnetosphere of an accreting neutron star is investigated. First the radial extension of such a magnetospheric disc is explored. Then a mechanism for magnetospheric accretion is proposed, reconsidering the bending wave explored by Agapitou, Papaloizou & Terquem (1997), that was found to be stable in ideal MHD. We show that this warping becomes unstable and can reach high amplitudes, in a variant of Pringle's radiation-driven model for the warping of AGN accretion discs (Pringle (1996)). Finally we discuss how this mechanism might give a clue to explain the observed X-ray kHz QPO of neutron star binaries.
Keywords
Cite
@article{arxiv.0906.4928,
title = {Warping modes in discs around accreting neutron stars},
author = {H. Meheut and M. Tagger},
journal= {arXiv preprint arXiv:0906.4928},
year = {2015}
}
Comments
Accepted for publication in MNRAS