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dc.contributor.authorShannon, Ryan
dc.contributor.authorRavi, V.
dc.contributor.authorLentati, L.
dc.contributor.authorLasky, P.
dc.contributor.authorHobbs, G.
dc.contributor.authorKerr, M.
dc.contributor.authorManchester, R.
dc.contributor.authorColes, W.
dc.contributor.authorLevin, Y.
dc.contributor.authorBailes, M.
dc.contributor.authorBhat, N.
dc.contributor.authorBurke-Spolaor, S.
dc.contributor.authorDai, S.
dc.contributor.authorKeith, M.
dc.contributor.authorOslowski, S.
dc.contributor.authorReardon, D.
dc.contributor.authorVan Strateni, W.
dc.contributor.authorToomey, L.
dc.contributor.authorWang, J.
dc.contributor.authorWen, L.
dc.contributor.authorWyithe, J.
dc.contributor.authorZhu, X.
dc.identifier.citationShannon, R. and Ravi, V. and Lentati, L. and Lasky, P. and Hobbs, G. and Kerr, M. and Manchester, R. et al. 2015. Gravitational waves from binary supermassive black holes missing in pulsar observations. Science. 349 (6255): pp. 1522-1525.

Gravitational waves are expected to be radiated by supermassive black hole binaries formed during galaxy mergers. A stochastic superposition of gravitational waves from all such binary systems would modulate the arrival times of pulses from radio pulsars. Using observations of millisecond pulsars obtained with the Parkes radio telescope, we constrained the characteristic amplitude of this background, Acyr, to be <1.0 × 10-15 with 95% confidence.This limit excludes predicted ranges for Acyr from current models with 91 to 99.7% probability. We conclude that binary evolution is either stalled or dramatically accelerated by galactic-center environments and that higher-cadence and shorterwavelength observations would be more sensitive to gravitational waves.

dc.publisherAmerican Association for the Advancement of Science
dc.titleGravitational waves from binary supermassive black holes missing in pulsar observations
dc.typeJournal Article
curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusFulltext not available

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