Gravitational radiation from the pulsar glitch recovery phase
Mark Bennett
University of Melbourne
Pulsar glitches are a potential source of gravitational waves.
Nonaxisymmetric vortex rearrangement during a glitch and meridional
circulation inside the neutron star throughout the post-glitch recovery
phase emits gravitational radiation. We focus on the latter and derive the
spin up flow throughout the neutron interior using a simple hydrodynamical
model. The resulting gravitational wave signal depends sensitively
on the properties of the neutron star interior. The signal-to-noise
ratio for a coherent search suggests that the largest glitches may be
detectable by future generation laser interferometer gravitational wave
detectors. Furthermore, the compressibility and viscosity of the interior
matter, as well as the stratification length-scale and inclination angle
of the star, can be inferred in principle from a gravitational wave
detection. These properties have been measured in terrestrial heavy-ion
colliders but not in the many-body, low-energy regime found in neutron
stars.
Date: | Lundi, le 19 juillet 2010 |
Heure: | 15:00 |
Lieu: | Université McGill |
| Ernest Rutherford Physics Building, room 326 |
Contact: | Robert Rutledge |
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