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European Pulsar Timing Array limits on an isotropic stochastic gravitational-wave background
文献类型：期刊论文
| 作者 | Possenti, A.4; Tiburzi, C.4,19; Theureau, G.2,3,20; Stappers, B.6; Smits, R.5; Rosado, P. A.17,18; Purver, M. B.6; Petiteau, A.12; Vecchio, A.9; Caballero, R. N.10 |
| 刊名 | Monthly Notices of the Royal Astronomical Society
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 453期号:3页码:2576-2598 |
| ISSN号 | 0035-8711 |
| 关键词 | Gravitational Waves Methods: Data Analysis Pulsars: General |
| DOI | 10.1093/mnras/stv1538 |
| 文献子类 | Article |
| 英文摘要 | 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 < 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. |
| WOS关键词 | black-hole binaries ; millisecond pulsars ; cosmic strings ; hierarchical-models ; infinite strings ; galaxy formation ; brane ; inflation ; radiation ; precision ; evolution |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 项目编号 | PHY-0960291 ; 11373011 ; PF3-140116 ; 337062 ; 610058 |
| WOS记录号 | WOS:000363649000031 |
| 资助机构 | European 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 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/1604]  |
| 专题 | 新疆天文台_110米口径全可动射电望远镜（SmART）_110米大口径全可动射电望远镜关键技术研究（973项目）_课题1：大样本射电天体的观测和前沿问题研究 |
| 通讯作者 | Lentati, L |
| 作者单位 | 1.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, P. R. China 2.Station de radioastronomie de Nanc¸ay, Observatoire de Paris, CNRS/INSU F-18330 Nanc¸ay, France 3.Laboratoire de Physique et Chimie de l’Environnement et de l’Espace LPC2E CNRS-Universit´e d’Orl´eans, F-45071 Orl´eans, France 4.INAF –Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius, Italy 5.ASTRON, The Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA, Dwingeloo, the Netherlands 6.Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK 7.Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands 8.Max-Planck-Institut fur Gravitationsphysik, Albert Einstein Institut, Am Muhlenberg 1, D-14476 Golm, Germany 9.School of Physics and Astronomy, University of Birmingham, Edgbaston,Birmingham B15 2TT, UK 10.Max-Planck-Institut fur Radioastronomie, Auf dem Hugel 69, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Possenti, A.,Tiburzi, C.,Theureau, G.,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 | Possenti, A..,Tiburzi, C..,Theureau, G..,Stappers, B..,Smits, R..,...&Sanidas, S. A..(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 | Possenti, A.,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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