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The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background

文献类型：期刊论文

作者Arzoumanian, Z.37,38; Baker, P. T.39,40; Brazier, A.41; Burke-Spolaor, S.39,40; Chamberlin, S. J.1; Chatterjee, S.41; Christy, B.2; Cordes, J. M.41; Cornish, N. J.3; Crawford, F.4
刊名ASTROPHYSICAL JOURNAL
出版日期2018-05-20
卷号859期号:1页码:22
关键词ephemerides gravitational waves inflation methods: data analysis pulsars: general quasars: supermassive black holes
ISSN号0004-637X
DOI10.3847/1538-4357/aabd3b
英文摘要We search for an isotropic stochastic gravitational-wave background (GWB) in the newly released 11. year data set from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). While we find no evidence for a GWB, we place constraints on a population of inspiraling supermassive black hole (SMBH) binaries, a network of decaying cosmic strings, and a primordial GWB. For the first time, we find that the GWB constraints are sensitive to the solar system ephemeris (SSE) model used and that SSE errors can mimic a GWB signal. We developed an approach that bridges systematic SSE differences, producing the first pulsar-timing array PTA) constraints that are robust against SSE errors. We thus place a 95% upper limit on the GW-strain amplitude of AGWB. < 1.45 x 10(-15) at a frequency of f = 1 yr(-1) for a fiducial f(-2/3) power-law spectrum and with interpulsar correlations modeled. This is a factor of similar to 2 improvement over the NANOGrav nine-year limit calculated using the same procedure. Previous PTA upper limits on the GWB (as well as their astrophysical and cosmological interpretations) will need revision in light of SSE systematic errors. We use our constraints to characterize the combined influence on the GWB of the stellar mass density in galactic cores, the eccentricity of SMBH binaries, and SMBH-galactic-bulge scaling relationships. We constrain the cosmic-string tension using recent simulations, yielding an SSE-marginalized 95% upper limit of G mu < 5.3 x 10(-11) -a factor of similar to 2 better than the published NANOGrav nine-year constraints. Our SSE-marginalized 95% upper limit on the energy density of a primordial GWB (for a radiation-dominated post-inflation universe) is Omega(GWB) h(2) < 3.4 x 10(-10)
WOS关键词BLACK-HOLE BINARIES ; ROTATING STELLAR-SYSTEMS ; ACTIVE GALACTIC NUCLEI ; MONTE-CARLO METHODS ; COSMIC STRINGS ; GRAVITY-WAVES ; ARRAY DATA ; GAS DISCS ; RADIATION ; LIMITS
资助项目NSF Physics Frontier Center[1430284] ; NSERC ; Canadian Institute for Advanced Research ; JPL RTD program ; NASA through Einstein Fellowship[PF4-150120] ; NSF[1458952] ; NSF[OIA-1458952] ; NSF[0923409] ; West Virginia University Center for Gravitational Waves and Cosmology ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000] ; NASA Einstein Fellowship[PF3-140116] ; National Science Foundation[PHYS-1066293] ; National Science Foundation[OCI-0725070] ; National Science Foundation[ACI-1238993] ; Chief of Naval Research ; NSF under MRI-R2 award[PHY-0960291] ; Sherman Fairchild Foundation ; state of Illinois ; Simons Foundation
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000432981500007
出版者IOP PUBLISHING LTD
资助机构NSF Physics Frontier Center ; NSF Physics Frontier Center ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; JPL RTD program ; JPL RTD program ; NASA through Einstein Fellowship ; NASA through Einstein Fellowship ; NSF ; NSF ; West Virginia University Center for Gravitational Waves and Cosmology ; West Virginia University Center for Gravitational Waves and Cosmology ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA Einstein Fellowship ; NASA Einstein Fellowship ; National Science Foundation ; National Science Foundation ; Chief of Naval Research ; Chief of Naval Research ; NSF under MRI-R2 award ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; Sherman Fairchild Foundation ; state of Illinois ; state of Illinois ; Simons Foundation ; Simons Foundation ; NSF Physics Frontier Center ; NSF Physics Frontier Center ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; JPL RTD program ; JPL RTD program ; NASA through Einstein Fellowship ; NASA through Einstein Fellowship ; NSF ; NSF ; West Virginia University Center for Gravitational Waves and Cosmology ; West Virginia University Center for Gravitational Waves and Cosmology ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA Einstein Fellowship ; NASA Einstein Fellowship ; National Science Foundation ; National Science Foundation ; Chief of Naval Research ; Chief of Naval Research ; NSF under MRI-R2 award ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; Sherman Fairchild Foundation ; state of Illinois ; state of Illinois ; Simons Foundation ; Simons Foundation ; NSF Physics Frontier Center ; NSF Physics Frontier Center ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; JPL RTD program ; JPL RTD program ; NASA through Einstein Fellowship ; NASA through Einstein Fellowship ; NSF ; NSF ; West Virginia University Center for Gravitational Waves and Cosmology ; West Virginia University Center for Gravitational Waves and Cosmology ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA Einstein Fellowship ; NASA Einstein Fellowship ; National Science Foundation ; National Science Foundation ; Chief of Naval Research ; Chief of Naval Research ; NSF under MRI-R2 award ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; Sherman Fairchild Foundation ; state of Illinois ; state of Illinois ; Simons Foundation ; Simons Foundation ; NSF Physics Frontier Center ; NSF Physics Frontier Center ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; JPL RTD program ; JPL RTD program ; NASA through Einstein Fellowship ; NASA through Einstein Fellowship ; NSF ; NSF ; West Virginia University Center for Gravitational Waves and Cosmology ; West Virginia University Center for Gravitational Waves and Cosmology ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA Einstein Fellowship ; NASA Einstein Fellowship ; National Science Foundation ; National Science Foundation ; Chief of Naval Research ; Chief of Naval Research ; NSF under MRI-R2 award ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; Sherman Fairchild Foundation ; state of Illinois ; state of Illinois ; Simons Foundation ; Simons Foundation
源URL[http://ir.bao.ac.cn/handle/114a11/21636]  
专题中国科学院国家天文台
通讯作者Taylor, S. R.
作者单位1.Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
2.Notre Dame Maryland Univ, 4701 N Charles St, Baltimore, MD 21210 USA
3.Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
4.Franklin & Marshall Coll, Dept Phys & Astron, POB 3003, Lancaster, PA 17604 USA
5.Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA
6.Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada
7.Lafayette Coll, Dept Phys, Easton, PA 18042 USA
8.Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USA
9.Hillsdale Coll, Dept Phys, 33 E Coll St, Hillsdale, MI 49242 USA
10.Univ East Anglia, Dept Phys, Norwich, Norfolk, England
推荐引用方式
GB/T 7714		 Arzoumanian, Z.,Baker, P. T.,Brazier, A.,et al. The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background[J]. ASTROPHYSICAL JOURNAL,2018,859(1):22.
APA Arzoumanian, Z..,Baker, P. T..,Brazier, A..,Burke-Spolaor, S..,Chamberlin, S. J..,...&Zhu, W. W..(2018).The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background.ASTROPHYSICAL JOURNAL,859(1),22.
MLA Arzoumanian, Z.,et al."The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background".ASTROPHYSICAL JOURNAL 859.1(2018):22.

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