The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics
文献类型：期刊论文
| 作者 | Hazboun, J. S.141; Simon, J.140; Taylor, S. R.139; Lam, M. T.; Vigeland, S. J.138; Islo, K.; Key, J. S.; Arzoumanian, Z.; Baker, P. T.; Brazier, A. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-02-20 |
| 卷号 | 890期号:2页码:15 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab68db |
| 通讯作者 | Hazboun, J. S.(hazboun@uw.edu) |
| 英文摘要 | An ensemble of inspiraling supermassive black hole binaries should produce a stochastic background of very low frequency gravitational waves. This stochastic background is predicted to be a power law, with a gravitational-wave strain spectral index of -2/3, and it should be detectable by a network of precisely timed millisecond pulsars, widely distributed on the sky. This paper reports a new "time slicing" analysis of the 11 yr data release from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) using 34 millisecond pulsars. Methods to flag potential "false-positive" signatures are developed, including techniques to identify responsible pulsars. Mitigation strategies are then presented. We demonstrate how an incorrect noise model can lead to spurious signals, and we show how independently modeling noise across 30 Fourier components, spanning NANOGrav's frequency range, effectively diagnoses and absorbs the excess power in gravitational-wave searches. This results in a nominal, and expected, progression of our gravitational-wave statistics. Additionally, we show that the first interstellar medium event in PSR J1713+0747 pollutes the common red-noise process with low spectral index noise, and we use a tailored noise model to remove these effects. |
| WOS关键词 | PULSAR-TIMING ARRAY ; BLACK-HOLE BINARIES ; MILLISECOND PULSARS ; DISPERSION ; RADIATION ; SIGNAL ; LIMITS ; NOISE ; TIME |
| 资助项目 | National Science Foundation (NSF) PIRE program[0968296] ; NSF Physics Frontier Center award[1430284] ; NSERC ; Canadian Institute for Advanced Research ; JPL RTD program ; NASA through Einstein Fellowship[PF4-150120] ; NSF[1458952] ; NSF[0923409] ; NSF[AST-1744119] ; West Virginia University Center for Gravitational Waves and Cosmology ; National Science Foundation[PHYS1066293] ; 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:000522100700017 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Science Foundation (NSF) PIRE program ; NSF Physics Frontier Center award ; NSERC ; Canadian Institute for Advanced Research ; JPL RTD program ; NASA through Einstein Fellowship ; NSF ; West Virginia University Center for Gravitational Waves and Cosmology ; National Science Foundation ; Chief of Naval Research ; NSF under MRI-R2 award ; Sherman Fairchild Foundation ; state of Illinois ; Simons Foundation |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6439]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Hazboun, J. S. |
| 作者单位 | 1.Swiss Fed Inst Technol, Zurich, Switzerland 2.Univ Turku, Dept Phys & Astron, Tuorla Observ, Turku, Finland 3.Rudjer Boskovic Inst, Croatian Consortium, Zagreb, Croatia 4.Univ Oulu, Astron Res Unit, Finnish MAGIC Consortium, Oulu, Finland 5.Univ Barcelona, ICCUB, IEEC UB, Barcelona, Spain 6.Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria 7.IFPU, Trieste, Italy 8.Univ Trieste, Dipartimento Fis, Trieste, Italy 9.Tokai Univ, Japanese MAGIC Consortium, Hiratsuka, Kanagawa, Japan 10.RIKEN, Japanese MAGIC Consortium, Wako, Saitama, Japan |
| 推荐引用方式 GB/T 7714 | Hazboun, J. S.,Simon, J.,Taylor, S. R.,et al. The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics[J]. ASTROPHYSICAL JOURNAL,2020,890(2):15. |
| APA | Hazboun, J. S..,Simon, J..,Taylor, S. R..,Lam, M. T..,Vigeland, S. J..,...&Zhu, W. W..(2020).The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics.ASTROPHYSICAL JOURNAL,890(2),15. |
| MLA | Hazboun, J. S.,et al."The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics".ASTROPHYSICAL JOURNAL 890.2(2020):15. |
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