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CYCLOTRON MASER EMISSION FROM POWER-LAW ELECTRONS WITH STRONG PITCH-ANGLE ANISOTROPY
Zhao, G. Q.1; Feng, H. Q.1; Wu, D. J.2; Chen, L.2; Tang, J. F.3; Liu, Q.1
2016-05-10
Source PublicationASTROPHYSICAL JOURNAL
Volume822Issue:2
AbstractEnergetic electrons with power-law spectra are commonly observed in astrophysics. This paper investigates electron cyclotron maser emission (ECME) from the power-law electrons, in which strong pitch-angle anisotropy is emphasized. The electron distribution function proposed in this paper can describe various types of pitch-angle anisotropy. Results show that the emission properties of ECME, including radiation growth, propagation, and frequency properties, depend considerably on the types of electron pitch-angle anisotropy, and different wave modes show different dependences on the pitch angle of electrons. In particular, the maximum growth rate of the X2 mode rapidly decreases with respect to the electron pitch-angle cosine mu(0) at which the electron distribution peaks, while the growth rates for other modes (X1, O1, O2) initially increase before decreasing as mu(0) increases. Moreover, the O mode, as well as the X mode, can be the fastest growth mode, in terms of not only the plasma parameter but also the type of electron pitch-angle distribution. This result presents a significant extension of the recent researches on ECME driven by the lower energy cutoff of power-law electrons, in which the X mode is generally the fastest growth mode.
KeywordPlasmas Radiation Mechanisms: Non-thermal Sun: Radio Radiation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/822/2/58
WOS KeywordSOLAR RADIO-BURSTS ; TERRESTRIAL KILOMETRIC RADIATION ; RECONNECTING CURRENT SHEET ; ENERGY CUTOFF BEHAVIOR ; X-RAY-BURSTS ; DIRECT AMPLIFICATION ; PARTICLE-ACCELERATION ; MAGNETIC-FIELD ; GYROSYNCHROTRON EMISSION ; NONTHERMAL ELECTRONS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000377204900001
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16235
Collection太阳和太阳系等离子体研究团组
Affiliation1.Luoyang Normal Univ, Inst Space Phys, Luoyang 471022, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Zhao, G. Q.,Feng, H. Q.,Wu, D. J.,et al. CYCLOTRON MASER EMISSION FROM POWER-LAW ELECTRONS WITH STRONG PITCH-ANGLE ANISOTROPY[J]. ASTROPHYSICAL JOURNAL,2016,822(2).
APA Zhao, G. Q.,Feng, H. Q.,Wu, D. J.,Chen, L.,Tang, J. F.,&Liu, Q..(2016).CYCLOTRON MASER EMISSION FROM POWER-LAW ELECTRONS WITH STRONG PITCH-ANGLE ANISOTROPY.ASTROPHYSICAL JOURNAL,822(2).
MLA Zhao, G. Q.,et al."CYCLOTRON MASER EMISSION FROM POWER-LAW ELECTRONS WITH STRONG PITCH-ANGLE ANISOTROPY".ASTROPHYSICAL JOURNAL 822.2(2016).
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