Frequency-dependent Emission of the Millisecond Pulsar B1937+21 with the Parkes Ultrawideband Receiver
文献类型：期刊论文
| 作者 | Wang, Z.1,2,6; Wen, Z. G.1,2,3; Yuan, J. P.2; Wang, N.2; Han, W.2; Wang, H. G.4; Chen, J. L.5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 987期号:1页码:43 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/add728 |
| 产权排序 | 1 |
| 英文摘要 | In this study, we report on the broadband polarization behavior of the millisecond pulsar B1937+21 (J1939+2134), using high-quality observations made with the ultrawideband low receiver on Murriyang, the Parkes radio telescope. Observations spanning approximately 3 yr are carefully calibrated and integrated to produce high-signal-to-noise-ratio pulse profiles. Updated and accurate interstellar medium parameters toward the pulsar are obtained. The temporal variability of the dispersion measure, the Faraday rotation measure, and the flux density are analyzed from their corresponding structure functions. The frequency-and-longitude-dependent polarization evolutions are investigated. The spectra of the mean flux density follow a high-frequency cutoff power law, with the interpulse spectra being steeper than the main pulse. The fractional linear polarization of the main pulse decreases with increasing frequency, while the interpulse presents the opposite trend. Both the main pulse and interpulse exhibit increasing absolute circular polarization with increasing frequency. The peak intensity ratio of the main pulse to the interpulse increases with frequency, following a power-law spectrum with an index of 0.52 +/- 0.02. The pulse width decreases with increasing frequency, further confirming that the emission height decreases with frequency, consistent with the results obtained from relativistic effects. These findings will contribute to a deeper understanding of the underlying emission mechanisms. |
| WOS关键词 | INTERSTELLAR SCINTILLATION ; TIMING ARRAY ; REFRACTIVE SCINTILLATION ; RADIO PULSARS ; DISPERSION ; PRECISION ; PROPAGATION ; POLARIMETRY ; STABILITY ; ROTATION |
| 资助项目 | National Key Research and Development Program of China[2022YFC2205203] ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region[2022A03013-1] ; National Natural Science Foundation of China (NSFC)[12303053] ; National Natural Science Foundation of China (NSFC)[12288102] ; National Natural Science Foundation of China (NSFC)[12041301] ; The 2021 project Xinjiang Uygur autonomous region of China for Tianshan elites ; Youth Innovation Promotion Association of CAS[2023069] ; Tianshan Talent Training Program[2023TSYCCX0100] ; Tianshan Talent Program of Xinjiang Uygur autonomous region, China[2023TSYCTD0013] ; Open project of the Key Laboratory in Xinjiang Uygur Autonomous Region of China[2023D04058] ; Australian Government |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001517650800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Key Research and Development Program of China ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region ; National Natural Science Foundation of China (NSFC) ; The 2021 project Xinjiang Uygur autonomous region of China for Tianshan elites ; Youth Innovation Promotion Association of CAS ; Tianshan Talent Training Program ; Tianshan Talent Program of Xinjiang Uygur autonomous region, China ; Open project of the Key Laboratory in Xinjiang Uygur Autonomous Region of China ; Australian Government |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7864]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Wen, Z. G.; Yuan, J. P. |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 4.Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Guangdong, Peoples R China 5.Yuncheng Univ, Dept Phys & Elect Engn, Yuncheng 044000, Shanxi, Peoples R China 6.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Z.,Wen, Z. G.,Yuan, J. P.,et al. Frequency-dependent Emission of the Millisecond Pulsar B1937+21 with the Parkes Ultrawideband Receiver[J]. ASTROPHYSICAL JOURNAL,2025,987(1):43. |
| APA | Wang, Z..,Wen, Z. G..,Yuan, J. P..,Wang, N..,Han, W..,...&Chen, J. L..(2025).Frequency-dependent Emission of the Millisecond Pulsar B1937+21 with the Parkes Ultrawideband Receiver.ASTROPHYSICAL JOURNAL,987(1),43. |
| MLA | Wang, Z.,et al."Frequency-dependent Emission of the Millisecond Pulsar B1937+21 with the Parkes Ultrawideband Receiver".ASTROPHYSICAL JOURNAL 987.1(2025):43. |
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。