ELECTRON CYCLOTRON MASER INSTABILITY IN SPACE PLASMAS WITH KAPPA LOSS-CONE DISTRIBUTION

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	ELECTRON CYCLOTRON MASER INSTABILITY IN SPACE PLASMAS WITH KAPPA LOSS-CONE DISTRIBUTION
	Tang, J. F.1,2,3; Wu, D. J.1; Yan, Y. H.2
刊名	ASTROPHYSICAL JOURNAL
	2012-02-01
卷号	745 期号:2 页码:134(5pp)
关键词	instabilities masers plasmas radiation mechanisms: non-thermal Sun: radio radiation
ISSN号	0004-637X
英文摘要	It is well known that non-thermal electrons, often modeled by the kappa distribution, are ubiquitously observed in space. Kappa-type distributions have been widely discussed in various plasma environments. On the other hand, when these non-thermal electrons are trapped by magnetic fields in space they frequently have a loss-cone distribution in velocity space. In this paper, we investigated the growth rates of electron cyclotron maser (ECM) instability in space plasmas by using a kappa loss-cone distribution. Based on the cold plasma assumption and weakly relativistic approximation, the results show that non-thermal electrons with such a distribution can excite ECM emission efficiently. The growth rates of O1 and X2 modes both increase with the kappa spectral index (kappa) but the growth rate of X2 mode increases slightly more rapidly than that of O1 mode. The present analysis also shows that the growth rates increase rapidly with the loss-cone index sigma for sigma < 10 but increase comparatively slowly for larger sigma values.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	TERRESTRIAL KILOMETRIC RADIATION ; POWER-LAW ELECTRONS ; SOLAR RADIO-BURSTS ; DIRECT AMPLIFICATION ; EMISSION ; GENERATION ; DRIVEN ; WAVES
收录类别	SCI
语种	英语
WOS记录号	WOS:000300326800032
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8061]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	1.CAS, Purple Mt Observ, Nanjing 210008, Peoples R China 2.CAS, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Tang, J. F.,Wu, D. J.,Yan, Y. H.. ELECTRON CYCLOTRON MASER INSTABILITY IN SPACE PLASMAS WITH KAPPA LOSS-CONE DISTRIBUTION[J]. ASTROPHYSICAL JOURNAL,2012,745(2):134(5pp).
APA	Tang, J. F.,Wu, D. J.,&Yan, Y. H..(2012).ELECTRON CYCLOTRON MASER INSTABILITY IN SPACE PLASMAS WITH KAPPA LOSS-CONE DISTRIBUTION.ASTROPHYSICAL JOURNAL,745(2),134(5pp).
MLA	Tang, J. F.,et al."ELECTRON CYCLOTRON MASER INSTABILITY IN SPACE PLASMAS WITH KAPPA LOSS-CONE DISTRIBUTION".ASTROPHYSICAL JOURNAL 745.2(2012):134(5pp).