Publication date: Oct 2008
We discuss the possibility that high-frequency QPOs in neutron-star
systems may result from forced resonant oscillations of matter in the
innermost parts of the accretion disc, excited by gravitational
coming from asymmetries of the neutron star or from the companion star.
find that neutron-star asymmetries could, in principle, be effective for
inducing both radial and vertical oscillations of relevant amplitude
the binary companion might possibly produce significant radial
but not vertical ones. Misaligned neutron-star quadrupole moments of a
advocated elsewhere for explaining limiting neutron star periods could
large enough also for the present purpose.
Stuchlík, Z.; Konar, S.; Miller, J. C.; Hledík, S.;