Gravitational waves from long-duration simulations of the dynamical bar instability

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Abstract
Compact astrophysical objects that rotate rapidly may encounter the dynamical “bar instability.” The bar-like deformation induced by this rotational instability causes the object to become a potentially strong source of gravitational radiation. We have carried out a set of long-duration simulations of the bar instability with two Eulerian hydrodynamics codes. Our results indicate that the remnant of this instability is a persistent bar-like structure that emits a long-lived gravitational radiation signal.