The NANOGrav 12.5 yr Data Set: The Frequency Dependence of Pulse Jitter in Precision Millisecond Pulsars
文献类型：期刊论文
| 作者 | Lam, M. T.2,3; McLaughlin, M. A.2,3; Arzoumanian, Z.4,5; Blumer, H.2,3; Brook, P. R.2,3; Cromartie, H. T.6; Demorest, P. B.7; DeCesar, M. E.8; Dolch, T.9; Ellis, J. A.10 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-02-20 |
| 卷号 | 872期号:2页码:17 |
| ISSN号 | 0004-637X |
| 关键词 | gravitational waves pulsars: general |
| DOI | 10.3847/1538-4357/ab01cd |
| 英文摘要 | Low-frequency gravitational-wave experiments require the highest timing precision from an array of the most stable millisecond pulsars. Several known sources of noise on short timescales in single radio pulsar observations are well described by a simple model of three components: template fitting from a finite signal-to-noise ratio, pulse phase/amplitude jitter from single-pulse stochasticity, and scintillation errors from short-timescale interstellar scattering variations. Currently template-fitting errors dominate, but as radio telescopes push toward higher signal-to-noise ratios, jitter becomes the next dominant term for most millisecond pulsars. Understanding the statistics of jitter becomes crucial for properly characterizing arrival time uncertainties. We characterize the radio frequency dependence of jitter using data on 48 pulsars in the North American Nanohertz Observatory for Gravitational Waves timing program. We detect significant jitter in 43 of the pulsars and test several functional forms for its frequency dependence; we find significant frequency dependence for 30 pulsars. We find moderate correlations of rms jitter with pulse width (R = 0.62) and number of profile components (R = 0.40); the single-pulse rms jitter is typically approximate to 1% of pulse phase. The average frequency dependence for all pulsars using a power-law model has index -0.42. We investigate the jitter variations for the interpulse of PSR. B1937+21 and find no significant deviations from the main pulse rms jitter. We also test the time variation of jitter in two pulsars and find that systematics likely bias the results for high-precision pulsars. Pulsar timing array analyses must properly model jitter as a significant component of the noise within the detector. |
| WOS关键词 | TIMING OBSERVATIONS ; EMISSION ; SCINTILLATIONS ; TOOLS |
| 资助项目 | NSF Physics Frontiers Center[1430284] ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; NSF[AST-1100968] ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000460814000016 |
| 资助机构 | NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; 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 ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; 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 ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; 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 ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; 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 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/25288]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Lam, M. T. |
| 作者单位 | 1.Univ Wisconsin, Dept Phys, Ctr Gravitat Cosmol & Astrophys, POB 413, Milwaukee, WI 53201 USA 2.West Virginia Univ, Dept Phys & Astron, POB 6315, Morgantown, WV 26506 USA 3.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA 4.NASA, Ctr Res & Explorat Space Sci & Technol, Code 662, Greenbelt, MD 20771 USA 5.NASA, Xray Astrophys Lab, Goddard Space Flight Ctr, Code 662, Greenbelt, MD 20771 USA 6.Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA 7.Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USA 8.Lafayette Coll, Dept Phys, Easton, PA 18042 USA 9.Hillsdale Coll, Dept Phys, 33 E Coll St, Hillsdale, MI 49242 USA 10.Infinia ML, 202 Rigsbee Ave, Durham, NC 27701 USA |
| 推荐引用方式 GB/T 7714 | Lam, M. T.,McLaughlin, M. A.,Arzoumanian, Z.,et al. The NANOGrav 12.5 yr Data Set: The Frequency Dependence of Pulse Jitter in Precision Millisecond Pulsars[J]. ASTROPHYSICAL JOURNAL,2019,872(2):17. |
| APA | Lam, M. T..,McLaughlin, M. A..,Arzoumanian, Z..,Blumer, H..,Brook, P. R..,...&Zhu, W. W..(2019).The NANOGrav 12.5 yr Data Set: The Frequency Dependence of Pulse Jitter in Precision Millisecond Pulsars.ASTROPHYSICAL JOURNAL,872(2),17. |
| MLA | Lam, M. T.,et al."The NANOGrav 12.5 yr Data Set: The Frequency Dependence of Pulse Jitter in Precision Millisecond Pulsars".ASTROPHYSICAL JOURNAL 872.2(2019):17. |
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来源：国家天文台
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