European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background

Lentati, L.; Taylor, Stephen R.; Mingarelli, Chiara M. F.; Sesana, Alberto; Sanidas, S. A.; Vecchio, A.; Caballero, R. N.; Lee, K. J.; Haasteren, Rutger van; Babak, S.; Bassa, C.; Brem, P.; Burgay, M.; Champion, D. J.; Cognard, I.; Desvignes, G.; Gair, J. R.; Guillemot, L.; Hessels, J. W. T.; Janssen, G. H.; Karuppusamy, R.; Krämer, M.; Lassus, A.; Lazarus, P.; Liu, K.; Osłowski, S.; Perrodin, D.; Petiteau, A.; Possenti, A.; Purver, M. B.; Rosado, P. A.; Smits, R.; Stappers, B. W.; Theureau, G.; Tiburzi, C.; Verbiest, J. P. W.

doi:10.1093/mnras/stv1538

articleMonthly Notices of the Royal Astronomical SocietyAug 31, 2015BRONZE OA

European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background

LLL. Lentati SRStephen R. Taylor CMChiara M. F. Mingarelli ASAlberto Sesana SAS. A. Sanidas

University of Cambridge · Jet Propulsion Laboratory · +19 more institutions

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Abstract

We present new limits on an isotropic stochastic gravitational-wave background (GWB) using a six pulsar data set spanning 18 yr of observations from the 2015 European Pulsar Timing Array data release. Performing a Bayesian analysis, we fit simultaneously for the intrinsic noise parameters for each pulsar, along with common correlated signals including clock, and Solar system ephemeris errors, obtaining a robust 95 per cent upper limit on the dimensionless strain amplitude A of the background of A

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Keywords

Physics
Gravitational wave
Pulsar
Astrophysics
Cosmic string
Gravitational wave background
Cosmic microwave background
Planck

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Affordable and clean energy

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