Gravitational waves from binary supermassive black holes missing in pulsar observations Article Swipe

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R. M. Shannon , Vikram Ravi , L. Lentati , P. D. Lasky , G. Hobbs , M. Kerr , R. N. Manchester , W. A. Coles , Y. Levin , M. Bailes , N. D. R. Bhat , Sarah Burke-Spolaor , Shi Dai , M. J. Keith , S. Osłowski , Daniel J. Reardon , W. van Straten , Lawrence Toomey , J.-B. Wang , L. Wen , J. Stuart B. Wyithe , X. J. Zhu ·

YOU? · · 2015 · Open Access · · DOI: https://doi.org/10.1126/science.aab1910 · OA: W2096367114

Placing bounds on gravitational wave detection Gravitational waves are expected to be generated by the interaction of the massive bodies in black-hole binary systems. As gravitational waves distort spacetime, it should be possible to verify their existence as they interfere with the pulses emitted by millisecond pulsars. However, after monitoring 24 pulsars with the Parkes radio telescope for 12 years, Shannon et al. found no detectable variation in pulsar records. This nondetection result indicates that a new detection strategy for gravitational waves is needed. Science , this issue p. 1522