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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![]() | |
2016-05-10 | |
Source Publication | ASTROPHYSICAL JOURNAL
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ISSN | 0004-637X |
Volume | 822Issue:2Pages:58 |
Contribution Rank | 3 |
Abstract | Energetic 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. |
Keyword | Plasmas Radiation Mechanisms: Non-thermal Sun: Radio Radiation |
Subtype | Article |
DOI | 10.3847/0004-637X/822/2/58 |
WOS Headings | Science & Technology ; Physical Sciences |
Indexed By | SCI |
Language | 英语 |
WOS Keyword | Solar Radio-bursts ; Terrestrial Kilometric Radiation ; Reconnecting Current Sheet ; Energy Cutoff Behavior ; X-ray-bursts ; Direct Amplification ; Particle-acceleration ; Magnetic-field ; Gyrosynchrotron Emission ; Nonthermal Electrons |
WOS Research Area | Astronomy & Astrophysics |
WOS Subject | Astronomy & Astrophysics |
WOS ID | WOS:000377204900001 |
Funding Organization | NSFC(41504131 ; Science and Technology Project of Henan Province(13IRTSTHN020 ; 41231068 ; 142102210109) ; 41274180 ; 41531071 ; 11373070 ; 41304136 ; 11303082) |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.xao.ac.cn/handle/45760611-7/1401 |
Collection | 光学天文与技术应用研究室 |
Affiliation | 1.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):58. |
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),58. |
MLA | Zhao, G. Q.,et al."CYCLOTRON MASER EMISSION FROM POWER-LAW ELECTRONS WITH STRONG PITCH-ANGLE ANISOTROPY".ASTROPHYSICAL JOURNAL 822.2(2016):58. |
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Zhao-2016-CYCLOTRON (813KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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