Beating the spin-down limit on gravitational wave emission from the Crab pulsar

Details Beating the spin-down limit on gravitational wave emission from the Crab pulsar Beating the spin-down limit on gravitational wave emission from the Crab pulsar

2008-05-30

arxiv.org/abs/0805.4758v2

Astrophys.J.683:L45-L50,2008; Erratum-ibid 706:L203-L204,2009

Astronomy and Astrophysics

Astrophysics

Accepted for Ap. J. Lett. Minor changes in results due to calibration correction

Scientific paper

10.1086/591526 10.1088/0004-637X

We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). These limits are based on two searches. In the first we assume that the gravitational wave emission follows the observed radio timing, giving an upper limit on gravitational wave emission that beats indirect limits inferred from the spin-down and braking index of the pulsar and the energetics of the nebula. In the second we allow for a small mismatch between the gravitational and radio signal frequencies and interpret our results in the context of two possible gravitational wave emission mechanisms.

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