Pulsar giant pulse: Coherent instability near light cylinder
文献类型：期刊论文
| 作者 | Wang, WeiYang1,2,3,4; Lu, JiGuang5,6; Zhang, SongBo2,7,8,9; Chen, XueLei1,2,10; Luo, Rui11,12; Xu, RenXin3,4,11 |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 62期号:7页码:10 |
| ISSN号 | 1674-7348 |
| 关键词 | neutron star pulsar radiation mechanisms instabilities in plasmas |
| DOI | 10.1007/s11433-018-9334-y |
| 通讯作者 | Wang, WeiYang(wywang@bao.ac.cn) |
| 英文摘要 | Giant pulses (GPs) are extremely bright individual pulses of radio pulsar. In microbursts of Crab pulsar, which is an active GP emitter, zebra-pattern-like spectral structures are observed, which are reminiscent of the zebra bands that are observed in type IV solar radio flares. However, band spacing linearly increases with the band center frequency of approximate to 5-30 GHz. In this study, we propose that the Crab pulsar GP can originate from the coherent instability of plasma near a light cylinder. Further, the growth of coherent instability can be attributed to the resonance observed between the cyclotron-resonant-excited wave and the background plasma oscillation. The particles can be injected into the closed-field line regions owing to magnetic reconnection near a light cylinder. These particles introduce a large amount of free energy that further causes cyclotron-resonant instability, which grows and amplifies radiative waves at frequencies close to the electron cyclotron harmonics that exhibit zebra-pattern-like spectral band structures. Further, these structures can be modulated by the resonance between the cyclotron-resonant-excited wave and the background plasma oscillation. In this scenario, the band structures of the Crab pulsar can be well fitted by a coherent instability model, where the plasma density of a light cylinder should be similar to 10(13-15) cm(-3), with an estimated gradient of >5:5 x 10(5) cm(-4). This process may be accompanied by high-energy emissions. Similar phenomena are expected to be detected in other types of GP sources that have magnetic fields of similar or equal to 10(6) G in a light cylinder. |
| WOS关键词 | ELECTRON-CYCLOTRON MASER ; FAST RADIO-BURST ; MULTIFREQUENCY OBSERVATIONS ; CRAB PULSAR ; EMISSION ; PLASMA ; GENERATION ; TURBULENCE ; TELESCOPE ; ORIGIN |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000460802400001 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23928]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Wang, WeiYang |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 4.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 8.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia 9.Univ Western Australia, Int Ctr Radio Astron Res, Crawley, WA 6009, Australia 10.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, WeiYang,Lu, JiGuang,Zhang, SongBo,et al. Pulsar giant pulse: Coherent instability near light cylinder[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,62(7):10. |
| APA | Wang, WeiYang,Lu, JiGuang,Zhang, SongBo,Chen, XueLei,Luo, Rui,&Xu, RenXin.(2019).Pulsar giant pulse: Coherent instability near light cylinder.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,62(7),10. |
| MLA | Wang, WeiYang,et al."Pulsar giant pulse: Coherent instability near light cylinder".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 62.7(2019):10. |
入库方式： OAI收割
来源：紫金山天文台
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