European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background
Lentati, L.1; Taylor, S. R.2,3; Mingarelli, C. M. F.4,5,6; Sesana, A.6,7; Sanidas, S. A.8,9; Vecchio, A.6; Caballero, R. N.5; Lee, K. J.5,10; van Haasteren, R.3; Babak, S.7; Bassa, C. G.9,11; Brem, P.7; Burgay, M.12; Champion, D. J.5; Cognard, I.13,14; Desvignes, G.5; Gair, J. R.2; Guillemot, L.13,14; Hessels, J. W. T.8,11; Janssen, G. H.9,11; Karuppusamy, R.5; Kramer, M.5,9; Lassus, A.5,15; Lazarus, P.5; Liu, K.5; Oslowski, S.5,16; Perrodin, D.12; Petiteau, A.15; Possenti, A.12; Purver, M. B.9; Rosado, P. A.17,18; Smits, R.11; Stappers, B.9; Theureau, G.13,14,19; Tiburzi, C.12,20; Verbiest, J. P. W.5,16; Lentati, L
Source PublicationMonthly Notices of the Royal Astronomical Society
AbstractWe 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 < 3.0 x 10(-15) at a reference frequency of 1 yr(-1) and a spectral index of 13/3, corresponding to a background from inspiralling supermassive black hole binaries, constraining the GW energy density to Omega(gw)(f)h(2) < 1.1 x 10(-9) at 2.8 nHz. We also present limits on the correlated power spectrum at a series of discrete frequencies, and show that our sensitivity to a fiducial isotropic GWB is highest at a frequency of similar to 5 x 10(-9) Hz. Finally, we discuss the implications of our analysis for the astrophysics of supermassive black hole binaries, and present 95 per cent upper limits on the string tension, G mu/c(2), characterizing a background produced by a cosmic string network for a set of possible scenarios, and for a stochastic relic GWB. For a Nambu-Goto field theory cosmic string network, we set a limit G mu/c(2) < 1.3x10(-7), identical to that set by the Planck Collaboration, when combining Planck and high-l cosmic microwave background data from other experiments. For a stochastic relic background, we set a limit of Omega(relic)(gw)(f)h(2) < 1.2 x 10(-9), a factor of 9 improvement over the most stringent limits previously set by a pulsar timing array.
KeywordGravitational Waves Methods: Data Analysis Pulsars: General
Indexed BySCI
WOS Keywordblack-hole binaries ; millisecond pulsars ; cosmic strings ; hierarchical-models ; infinite strings ; galaxy formation ; brane ; inflation ; radiation ; precision ; evolution
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000363649000031
Project NumberPHY-0960291 ; 11373011 ; PF3-140116 ; 337062 ; 610058
Funding OrganizationEuropean Research Council to implement the Large European Array for Pulsars (LEAP) ; 'Programme National de Cosmologie and Galaxies' (PNCG) of CNRS/INSU, France ; STFC in the UK ; Netherlands Foundation for Scientific Research NWO ; Higher Education Funding Council for England ; Science and Technology Facilities Council ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; Junior Research Fellowship at Trinity Hall College, Cambridge University ; NASA Postdoctoral Program at the Jet Propulsion Laboratory ; NASA ; Marie Curie International Outgoing Fellowship within the 7th European Community Framework Programme ; Royal Society ; NWO Vidi fellowship (PI JWTH) ; International Max Planck Research School Bonn/Cologne and the Bonn-Cologne Graduate School ; National Natural Science Foundation of China ; NASA Einstein Fellowship ; NWO Vidi fellowship ; ERC Starting Grant 'DRAG-NET' ; International Max Planck Research School Bonn/Cologne ; European Research Council for the ERC Synergy Grant BlackHoleCam ; Alexander von Humboldt Foundation
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Cited Times:181[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLentati, L
Affiliation1.Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK
2.Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
3.Jet Propulsion Laboratory, California Institute of Technology, Pasadena,CA 91109, USA
4.TAPIR (Theoretical Astrophysics), California Institute of Technology,Pasadena, CA 91125, USA
5.Max-Planck-Institut fur Radioastronomie, Auf dem Hugel 69, D-53121 Bonn, Germany
6.School of Physics and Astronomy, University of Birmingham, Edgbaston,Birmingham B15 2TT, UK
7.Max-Planck-Institut fur Gravitationsphysik, Albert Einstein Institut, Am Muhlenberg 1, D-14476 Golm, Germany
8.Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
9.Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK
10.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, P. R. China
11.ASTRON, The Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA, Dwingeloo, the Netherlands
12.INAF –Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius, Italy
13.Laboratoire de Physique et Chimie de l’Environnement et de l’Espace LPC2E CNRS-Universit´e d’Orl´eans, F-45071 Orl´eans, France
14.Station de radioastronomie de Nanc¸ay, Observatoire de Paris, CNRS/INSU F-18330 Nanc¸ay, France
15.Universit´e Paris-Diderot-Paris7 APC – UFR de Physique, Batiment Condorcet, 10 rue Alice Domont et L´eonie Duquet, F-75205 Paris Cedex 13, France
16.Fakultat fur Physik, Universitat Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
17.Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn VIC A-3122, Australia
18.Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Callinstraße 38, D-30167 Hanover, Germany
19.Laboratoire Univers et Th´eories LUTh, Observatoire de Paris, CNRS/INSU, Universit Paris Diderot, 5 place Jules Janssen, F-92190 Meudon, France
20.Dipartimento di Fisica – Universit´a di Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
Recommended Citation
GB/T 7714
Lentati, L.,Taylor, S. R.,Mingarelli, C. M. F.,et al. European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background[J]. Monthly Notices of the Royal Astronomical Society,2015,453(3):2576-2598.
APA Lentati, L..,Taylor, S. R..,Mingarelli, C. M. F..,Sesana, A..,Sanidas, S. A..,...&Lentati, L.(2015).European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background.Monthly Notices of the Royal Astronomical Society,453(3),2576-2598.
MLA Lentati, L.,et al."European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background".Monthly Notices of the Royal Astronomical Society 453.3(2015):2576-2598.
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