Results From Searches for a Continuous Gravitational Wave Signal From the Crab Pulsar

Astronomy and Astrophysics – Astronomy

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Scientific paper

The Crab pulsar has long been regarded as one of the best targets for gravitational wave detectors due to its youth and high spin-down rate. Data from the fifth science run of the LIGO gravitational wave detectors have been used to search for continuous wave emission from the Crab pulsar. A search has been performed assuming the gravitational wave emission is from a triaxial star at twice the electromagnetic emission frequency. A separate search has also covered a small physically motivated frequency range around this. We discuss the motivations for and results from these searches. We show how the results beat pre-existing limits on the gravitational wave emission set by energy conservation arguments and how this can be used to constrain the energy budget of the Crab pulsar.

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