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