热门
Identifying and mitigating noise sources in precision pulsar timing data sets
文献类型：期刊论文
| 作者 | Goncharov, B.9,10; Reardon, D. J.8,9; Shannon, R. M.8,9; Zhu, X. J.9,10; Thrane, E.9,10; Bailes, M.8,9; Bhat, N. D. R.7; Dai, S.6; Hobbs, G.6,9; Kerr, M.5 |
| 刊名 | Monthly Notices of the Royal Astronomical Society
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 502期号:1页码:478-493 |
| 关键词 | gravitational waves methods: data analysis pulsars: general millisecond pulsar time Astronomy & Astrophysics |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staa3411 |
| 产权排序 | 10 |
| 文献子类 | Article |
| 英文摘要 | Pulsar timing array projects measure the pulse arrival times of millisecond pulsars for the primary purpose of detecting nanohertz-frequency gravitational waves. The measurements include contributions from a number of astrophysical and instrumental processes, which can either be deterministic or stochastic. It is necessary to develop robust statistical and physical models for these noise processes because incorrect models diminish sensitivity and may cause a spurious gravitational wave detection. Here we characterize noise processes for the 26 pulsars in the second data release of the Parkes Pulsar Timing Array using Bayesian inference. In addition to well-studied noise sources found previously in pulsar timing array data sets such as achromatic timing noise and dispersion measure variations, we identify new noise sources including time-correlated chromatic noise that we attribute to variations in pulse scattering. We also identify 'exponential dip' events in four pulsars, which we attribute to magnetospheric effects as evidenced by pulse profile shape changes observed for three of the pulsars. This includes an event in PSR J1713+0747, which had previously been attributed to interstellar propagation. We present noise models to be used in searches for gravitational waves. We outline a robust methodology to evaluate the performance of noise models and identify unknown signals in the data. The detection of variations in pulse profiles highlights the need to develop efficient profile domain timing methods. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000649423200034 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4711]  |
| 专题 | 脉冲星研究团组 |
| 作者单位 | 1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, Xinjiang 830011, China 2.National Radio Astronomy Observatory, 1003 Lopezville Rd, Socorro, NM 87801, USA; 3.CSIRO Scientific Computing, Australian Technology Park, Locked Bag 9013, Alexandria, NSW 1435, Australia; 4.Max-Planck-Institut fur Radioastronomie, Auf dem H¨uugel 69, D-53121 Bonn, Germany; 5.Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352, USA; 6.CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia; 7.International Centre for Radio Astronomy Research, University of Western Australia, Crawley, WA 6009, Australia; 8.Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia; 9.Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav); 10.School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia; |
| 推荐引用方式 GB/T 7714 | Goncharov, B.,Reardon, D. J.,Shannon, R. M.,et al. Identifying and mitigating noise sources in precision pulsar timing data sets[J]. Monthly Notices of the Royal Astronomical Society,2021,502(1):478-493. |
| APA | Goncharov, B..,Reardon, D. J..,Shannon, R. M..,Zhu, X. J..,Thrane, E..,...&Wang, J. B..(2021).Identifying and mitigating noise sources in precision pulsar timing data sets.Monthly Notices of the Royal Astronomical Society,502(1),478-493. |
| MLA | Goncharov, B.,et al."Identifying and mitigating noise sources in precision pulsar timing data sets".Monthly Notices of the Royal Astronomical Society 502.1(2021):478-493. |
入库方式： OAI收割
来源：新疆天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。