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On the Time-Frequency Downward Drifting of Repeating Fast Radio Bursts

文献类型：期刊论文

作者Wang, Weiyang1,2,3,4; Zhang, Bing5; Chen, Xuelei1,2,6; Xu, Renxin3,4,7,8
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2019-05-01
卷号876期号:1页码:5
关键词pulsars: general radiation mechanisms: non-thermal radio continuum: general stars: neutron
ISSN号2041-8205
DOI10.3847/2041-8213/ab1aab
英文摘要The newly discovered second repeating fast radio burst (FRB) source, FRB 180814.J0422+73, was reported to exhibit a time-frequency downward drifting pattern, which is also seen in the first repeater FRB 121102. We propose a generic geometrical model to account for the observed downward drifting of sub-pulse frequency, within the framework of coherent curvature radiation by bunches of electron positron pairs in the magnetosphere of a neutron star (NS). A sudden trigger event excites these coherent bunches of charged particles, which stream outward along open field lines. As the field lines sweep across the line of sight, the bunches seen later travel farther into the less-curved part of the magnetic field lines, thus emitting at lower frequencies. We use this model to explain the time-frequency downward drifting in two FRB generation scenarios, the transient pulsar-like sparking from the inner gap region of a slowly rotating NS, and the externally triggered magnetosphere reconfiguration known as the "cosmic comb."
WOS关键词EMISSION ; SPARKS
资助项目MoST[2016YFE0100300] ; CAS[QYZDJ-SSW-SLH017] ; CAS[XDB 23040100] ; CAS[XDB23010200] ; National Key R&D Program of China[2017YFA0402602] ; NSFC[11673002] ; NSFC[U1531243] ; NSFC[11473044] ; NSFC[11653003]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000466902900005
出版者IOP PUBLISHING LTD
资助机构MoST ; MoST ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; MoST ; MoST ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; MoST ; MoST ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; MoST ; MoST ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
源URL[http://ir.bao.ac.cn/handle/114a11/26061]  
专题中国科学院国家天文台
通讯作者Wang, Weiyang
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100101, 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.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
6.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
7.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
8.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Weiyang,Zhang, Bing,Chen, Xuelei,et al. On the Time-Frequency Downward Drifting of Repeating Fast Radio Bursts[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,876(1):5.
APA Wang, Weiyang,Zhang, Bing,Chen, Xuelei,&Xu, Renxin.(2019).On the Time-Frequency Downward Drifting of Repeating Fast Radio Bursts.ASTROPHYSICAL JOURNAL LETTERS,876(1),5.
MLA Wang, Weiyang,et al."On the Time-Frequency Downward Drifting of Repeating Fast Radio Bursts".ASTROPHYSICAL JOURNAL LETTERS 876.1(2019):5.

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来源：国家天文台

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