Properties of pulsar subpulse drifting in different profile components
文献类型：期刊论文
| 作者 | Tu, Z. Y.3,4; Yuen, R.1,2,4 ; Han, X. H.4
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| 刊名 | JOURNAL OF ASTROPHYSICS AND ASTRONOMY
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| 出版日期 | 2022-06-01 |
| 卷号 | 43期号:1页码:14 |
| ISSN号 | 0250-6335 |
| 关键词 | Radiation mechanisms: nonthermal pulsar: general |
| DOI | 10.1007/s12036-022-09808-9 |
| 通讯作者 | Yuen, R.(ryuen@xao.ac.cn) |
| 英文摘要 | We investigate the emission properties of the pulsars that exhibit different drifting subpulses in different pulse profile components based on the model for obliquely rotating pulsar magnetospheres of multiple emission states. Emission from subpulses is assumed coming from m discrete areas located on carousels around the magnetic axis and flowing at rates determined by the E x B drift. An emission state is defined by this drift, and a change in the emission state corresponds to a change in the drift velocity. The model is applied to eight pulsars, all displaying drifting subpulses of particular properties along two different drift-bands at different parts of the pulse profile at 21 cm observing wavelength. Simulation is performed to identify the emission states for the different drifting subpulses and the associated values of m in the emission region. The results show that drifting subpulses in different profile components correspond to particular emission states and m, and that different emission states and m can coexist in an emission region. We determine the circulation time for plasma around the magnetosphere and show that it is related to the obliquity angle. By comparing with three other pulsars that display drifting subpulses of a single drift-band, we find that drifting subpulses demonstrate similar properties when considering the different drift-bands separately. We speculate, based on our results, that the coexistence of different drifting subpulses within a pulse profile may require additional mechanism, and the phenomenon is more common in pulsars with small obliquity angle. |
| WOS关键词 | RADIO-EMISSION ALTITUDE ; POLAR CAPS ; POTENTIAL DROPS ; SUB-PULSES ; ACCELERATION ; MODULATION ; MODEL ; POLARIZATION ; GEOMETRY |
| 资助项目 | 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 | INDIAN ACAD SCIENCES |
| WOS记录号 | WOS:000798174300001 |
| 资助机构 | 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/45760611-7/4764]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Yuen, R. |
| 作者单位 | 1.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 2.Chinese Acad Sciencess, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.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 | Tu, Z. Y.,Yuen, R.,Han, X. H.. Properties of pulsar subpulse drifting in different profile components[J]. JOURNAL OF ASTROPHYSICS AND ASTRONOMY,2022,43(1):14. |
| APA | Tu, Z. Y.,Yuen, R.,&Han, X. H..(2022).Properties of pulsar subpulse drifting in different profile components.JOURNAL OF ASTROPHYSICS AND ASTRONOMY,43(1),14. |
| MLA | Tu, Z. Y.,et al."Properties of pulsar subpulse drifting in different profile components".JOURNAL OF ASTROPHYSICS AND ASTRONOMY 43.1(2022):14. |
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来源：新疆天文台
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