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Type: Journal article
Title: Beating the spin-down limit on gravitational wave emission from the Vela pulsar
Author: Hosken, D.
Munch, J.
Ottaway, D.
Veitch, P.
Citation: Astrophysical Journal, 2011; 737(2):93-1-93-16
Publisher: Univ Chicago Press
Issue Date: 2011
ISSN: 0004-637X
Statement of
J. Abadie... J. Hosken... J. Munch... D. J. Ottaway... P. J. Veitch... et al., (LIGO Scientific Collaboration), (Virgo Collaboration)
Abstract: We present direct upper limits on continuous gravitational wave emission from the Vela pulsar using data from the Virgo detector’s second science run. These upper limits have been obtained using three independent methods that assume the gravitational wave emission follows the radio timing. Two of the methods produce frequentist upper limits for an assumed known orientation of the star’s spin axis and value of the wave polarization angle of, respectively, 1.9×10−24 and 2.2×10−24, with 95% confidence. The third method, under the same hypothesis, produces a Bayesian upper limit of 2.1×10−24, with 95% degree of belief. These limits are below the indirect spin-down limit of 3.3×10−24 for the Vela pulsar, defined by the energy loss rate inferred from observed decrease in Vela’s spin frequency, and correspond to a limit on the star ellipticity of ∼10−3. Slightly less stringent results, but still well below the spin-down limit, are obtained assuming the star’s spin axis inclination and the wave polarization angles are unknown.
Keywords: gravitational waves; pulsars: individual (PSR J0835–4510); stars: neutron
Rights: (c) IOP Publishing 2011. (c) 2011 The American Astronomical Society. All rights reserved
RMID: 0020112329
DOI: 10.1088/0004-637X/737/2/93
Appears in Collections:Chemistry and Physics publications
Environment Institute publications

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