Emission properties and bidrifting subpulses in pulsar PSR J0815+0939
文献类型：期刊论文
| 作者 | Han, X. H.3 ; Yuen, R.1,2,3
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2022-05-24 |
| 卷号 | 661页码:9 |
| ISSN号 | 0004-6361 |
| 关键词 | pulsars general stars neutron radiation mechanisms non-thermal |
| DOI | 10.1051/0004-6361/202243041 |
| 通讯作者 | Yuen, R.(ryuen@xao.ac.cn) |
| 英文摘要 | Context. We investigate the properties of the emission region in PSR J0815+0939 as revealed by the bidrifting subpulses. Aims. We identify the emission properties as implied by different states of emission, including the charge density and the subpulse number on the carousel, in association with the different subpulse drift properties in bidrifting. Methods. The investigation is based on the rotating carousel, incorporating the model for obliquely rotating pulsar magnetospheres of multiple emission states. For the subpulse drift velocity given by the electric drift, the latter changes as the emission state changes, resulting in the observed different drift-bands. Results. Our results show that observable emission of this pulsar comes from two rotating carousels. The carousel at higher height is occupied by two different emission states. We find that the subpulse drift direction is different for emission coming either from different emission states on the same carousel or from similar emission states, but located on different carousels. We consider that establishing the subpulse number on a carousel may involve a mechanism that is not a function of the age or the obliquity angle of the pulsar. We discuss that bidrifting may be a common phenomenon, but its detection requires particular emission characteristics of the pulsar. We relate different subpulse drift modes in bidrifting with drifting subpulses of time-dependent drift rates, and speculate that they may be two manifestations of the same underlying mechanism. |
| WOS关键词 | RADIO-EMISSION ; DRIFTING SUBPULSES ; POLAR CAPS ; POTENTIAL DROPS ; ACCELERATION ; POLARIZATION ; MODULATION ; FREQUENCY ; GEOMETRY ; ALTITUDE |
| 资助项目 | 2018 Project of Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents ; Natural Science Foundation of China[U1838109] ; Natural Science Foundation of China[11873080] ; Natural Science Foundation of China[12041301] ; CAS Pioneer Hundred Talents Program ; Xiaofeng Yang's Xinjiang Tianchi Bairen project |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000799616100014 |
| 资助机构 | 2018 Project of Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents ; Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program ; Xiaofeng Yang's Xinjiang Tianchi Bairen project |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4773]  |
| 专题 | 脉冲星研究团组 新疆天文台_科普办公室 |
| 通讯作者 | Yuen, R. |
| 作者单位 | 1.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, X. H.,Yuen, R.. Emission properties and bidrifting subpulses in pulsar PSR J0815+0939[J]. ASTRONOMY & ASTROPHYSICS,2022,661:9. |
| APA | Han, X. H.,&Yuen, R..(2022).Emission properties and bidrifting subpulses in pulsar PSR J0815+0939.ASTRONOMY & ASTROPHYSICS,661,9. |
| MLA | Han, X. H.,et al."Emission properties and bidrifting subpulses in pulsar PSR J0815+0939".ASTRONOMY & ASTROPHYSICS 661(2022):9. |
入库方式： OAI收割
来源：新疆天文台
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