Article,

Gravitational waves from binary supermassive black holes missing in pulsar observations

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Science, 349 (6255): 1522--1525 (Sep 25, 2015)
DOI: 10.1126/science.aab1910

Abstract

Gravity waves are expected to be generated by the interaction of the massive bodies in black-hole binary systems. As gravity 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 gravity waves is needed.

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