2006ApJ...641..471P

Recent time-dependent, ideal magnetohydrodynamic (ideal-MHD) simulations of polar magnetic burial in accreting neutron stars have demonstrated that stable, magnetically confined mountains form at the magnetic poles, emitting gravitational waves at f_*(stellar spin frequency) and 2f_*. Global MHD oscillations of the mountain, whether natural or stochastically driven, act to modulate the gravitational wave signal, creating broad sidebands (FWHM ∼0.2f_*) in the frequency spectrum around f_*and 2f_*. The oscillations can enhance the signal-to-noise ratio achieved by a long-baseline interferometer with coherent matched filtering by up to 15%, depending on where f_*lies relative to the noise curve minimum. Coherent, multidetector searches for continuous waves from nonaxisymmetric pulsars should be tailored accordingly.