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Gravitational waves from binary supermassive black holes missing in pulsar observations

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

in Astrophysics / Binary systems / Black holes / Black holes (astronomy) / Constraints / Gravitational waves / Gravity / Gravity waves / Millisecond pulsars / Pulsars / Radio / Radio telescopes

2015

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Gravitational waves from binary supermassive black holes missing in pulsar observations

in Astrophysics / Binary systems / Black holes / Black holes (astronomy) / Constraints / Gravitational waves / Gravity / Gravity waves / Millisecond pulsars / Pulsars / Radio / Radio telescopes

2015

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Gravitational waves from binary supermassive black holes missing in pulsar observations

in Astrophysics / Binary systems / Black holes / Black holes (astronomy) / Constraints / Gravitational waves / Gravity / Gravity waves / Millisecond pulsars / Pulsars / Radio / Radio telescopes

2015

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Journal Article

Gravitational waves from binary supermassive black holes missing in pulsar observations

Coles, W. A.,

Zhu, X.-J.,

Toomey, L.,

Reardon, D. J.,

Wen, L.,

Keith, M. J.,

van Straten, W.,

Lentati, L. T.,

Hobbs, G.,

Bhat, N. D. R.,

Dai, S.,

Manchester, R. N.,

Burke-Spolaor, S.,

Lasky, P. D.,

Bailes, M.,

Ravi, V.,

Wyithe, J. S. B.,

Levin, Y.,

Wang, J.-B.,

Shannon, R. M.,

Kerr, M.,

Osłowski, S.

2015

Overview

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, Ac,yr, to be <1.0 × 10–15 with 95% confidence. This limit excludes predicted ranges for Ac,yr 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 shorter-wavelength observations would be more sensitive to gravitational waves.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Astrophysics

/ Binary systems

/ Black holes

/ Black holes (astronomy)

/ Constraints

/ Gravitational waves

/ Gravity