PMO OpenIR
Pulsar giant pulse: Coherent instability near light cylinder
Wang, WeiYang1,2,3,4; Lu, JiGuang5,6; Zhang, SongBo2,7,8,9; Chen, XueLei1,2,10; Luo, Rui11,12; Xu, RenXin3,4,11
2019-07-01
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
Volume62Issue:7Pages:10
Corresponding AuthorWang, WeiYang(wywang@bao.ac.cn)
AbstractGiant 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.
Keywordneutron star pulsar radiation mechanisms instabilities in plasmas
DOI10.1007/s11433-018-9334-y
WOS KeywordELECTRON-CYCLOTRON MASER ; FAST RADIO-BURST ; MULTIFREQUENCY OBSERVATIONS ; CRAB PULSAR ; EMISSION ; PLASMA ; GENERATION ; TURBULENCE ; TELESCOPE ; ORIGIN
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000460802400001
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23929
Collection中国科学院紫金山天文台
Corresponding AuthorWang, WeiYang
Affiliation1.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
11.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
12.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, WeiYang]'s Articles
[Lu, JiGuang]'s Articles
[Zhang, SongBo]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, WeiYang]'s Articles
[Lu, JiGuang]'s Articles
[Zhang, SongBo]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, WeiYang]'s Articles
[Lu, JiGuang]'s Articles
[Zhang, SongBo]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.