Wideband Monitoring Observations of PSR J1803–3002A in the Globular Cluster NGC 6522
文献类型：期刊论文
| 作者 | Zhang,Lei7,8,9; Manchester,Richard N.9; Cameron,Andrew D.9; Hobbs,George9; Li,Di8,10,11 ; Dai,Shi9; Zhi,Qijun1,6; Zhu,Zonghong7; Wang,Jingbo3,4,5; Toomey,Lawrence8
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| 刊名 | The Astrophysical Journal Letters
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| 出版日期 | 2020-12-01 |
| 卷号 | 905期号:1 |
| 关键词 | Astronomy data analysis Globular star clusters Pulsars |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/abca40 |
| 英文摘要 | Abstract We report the first wideband monitoring observations of PSR?J1803?3002A, a relatively bright millisecond pulsar (MSP) in the globular cluster NGC 6522 with a spin period of 7.1 ms and no known binary companion. These observations were performed using the Parkes 64 m radio telescope with the Ultra-Wideband Low receiver system, which covers 704–4032 MHz. We confirm that PSR?J1803?3002A is an isolated MSP located near the cluster center and probe the emission properties of the pulsar over the wide observed band. The mean pulse profile consists of three components, with the outer components becoming more prominent at higher frequencies, and a mean spectral index for the pulsed emission of ?1.66?±?0.07 over the observed band. The fractional linear and circular polarization increase with increasing frequency, which is unusual for pulsars. We determine a Faraday rotation measure of ?107?±?6?rad?m?2 for the pulsar. PSR?J1803?3002A is a distant pulsar in the Galactic plane, but our observations show no evidence of pulse broadening due to interstellar scattering. These results demonstrate the power of ultra-wideband receivers and signal processing systems. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-905-1-ABCA40 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57874]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang 550001, People's Republic of China 2.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China 3.Xinjiang Key Laboratory of Radio Astrophysics, 150 Science 1-Street, Urumqi, Xinjiang, 830011, People's Republic of China 4.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, Xinjiang, 830011, People's Republic of China 5.Xinjiang Astronomical Observatory, 150, Science-1 Street, Urumqi 830011, People's Republic of China 6.School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, People's Republic of China 7.School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China 8.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100101, People's Republic of China leizhang996@nao.ac.cn, dili@nao.ac.cn 9.CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia 10.NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa |
| 推荐引用方式 GB/T 7714 | Zhang,Lei,Manchester,Richard N.,Cameron,Andrew D.,et al. Wideband Monitoring Observations of PSR J1803–3002A in the Globular Cluster NGC 6522[J]. The Astrophysical Journal Letters,2020,905(1). |
| APA | Zhang,Lei.,Manchester,Richard N..,Cameron,Andrew D..,Hobbs,George.,Li,Di.,...&Zhang,Songbo.(2020).Wideband Monitoring Observations of PSR J1803–3002A in the Globular Cluster NGC 6522.The Astrophysical Journal Letters,905(1). |
| MLA | Zhang,Lei,et al."Wideband Monitoring Observations of PSR J1803–3002A in the Globular Cluster NGC 6522".The Astrophysical Journal Letters 905.1(2020). |
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来源：国家天文台
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