The Influence of Different Solar System Planetary Ephemerides on Pulsar Timing
文献类型：期刊论文
| 作者 | Dai, Jian-Peng3,4; Han, Wei1,2,4 ; Wang, Na1,2,3,4
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2024-08-01 |
| 卷号 | 24期号:8页码:085008 |
| 关键词 | (stars:) pulsars: general Planetary Systems time ephemerides |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/ad484e |
| 产权排序 | 2 |
| 英文摘要 | Pulsar timing offers a comprehensive avenue for exploring diverse topics in physics and astrophysics. High-precision solar system planetary ephemeris is crucial for pulsar timing as it provides the positions and velocities of solar system planets including the Earth. However, it is inevitable that inherent inconsistencies exist in these ephemerides. Differences between various ephemerides can significantly impact pulsar timing and parameter estimations. Currently, pulsar timing highly depends on the JPL DE ephemeris, for instance, the Pulsar Timing Array data analysis predominantly utilizes DE436. In this study, we examine inconsistencies across various ephemeris series, including JPL DE, EPM, and INPOP. Notably, discrepancies emerge particularly between the current ephemeris DE436 and the earliest released ephemeris DE200, as well as the most recent ephemerides, e.g., DE440, INPOP21A, and EPM2021. Further detailed analysis of the effects of ephemeris on geometric correction procedures for the conversion of measured topocentric times of arrival is presented in this study. Our researches reveal that variations in the Roemer delays across different ephemerides lead to distinct differences. The timing residuals and the fact that these discrepancies can be readily incorporated into the subsequent pulsar parameters, leading to inconsistent fitting estimates, suggest that the influence of errors in the ephemeris on the timing process might currently be underappreciated. |
| WOS关键词 | ACCURACY ; PACKAGE ; TEMPO2 |
| 资助项目 | Chinese Academy of Sciences (CAS) Light of West China Program ; Tianshan talents program[2023TSYCTD0013] ; National Natural Science Foundation of China (NSFC)[12288102] ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region[2022A03013-3] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001276924600001 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 资助机构 | Chinese Academy of Sciences (CAS) Light of West China Program ; Tianshan talents program ; National Natural Science Foundation of China (NSFC) ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6892]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Han, Wei; Wang, Na |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 3.Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Jian-Peng,Han, Wei,Wang, Na. The Influence of Different Solar System Planetary Ephemerides on Pulsar Timing[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2024,24(8):085008. |
| APA | Dai, Jian-Peng,Han, Wei,&Wang, Na.(2024).The Influence of Different Solar System Planetary Ephemerides on Pulsar Timing.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,24(8),085008. |
| MLA | Dai, Jian-Peng,et al."The Influence of Different Solar System Planetary Ephemerides on Pulsar Timing".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 24.8(2024):085008. |
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来源：新疆天文台
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