Approximate expression of ellipse polarization degree for gyrosynchrotron radiation

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	Approximate expression of ellipse polarization degree for gyrosynchrotron radiation
	Zhou, AH
刊名	CHINESE PHYSICS LETTERS
	2002
卷号	19 期号:1 页码:144-146
英文摘要	We study the elliptical polarization degree (EPD) of gyrosynchrotron radiation for the case of transverse propagation. The EPD decreases with increasing ellipticity R (i.e. ratio of the major and minor axial lengths) and with decreasing electron energy spectral index delta. The EPD value varies from 0.55 to 0.15 in the whole range of 3 less than or equal to R less than or equal to 10 and 2 less than or equal to delta less than or equal to 7. An approximate expression for the EPD is proposed, in which we assume that the emitting electrons have an isotropic pitch angle distribution and a power-law distribution in energy. The expression is designed for the electron energy spectral index delta from 2 to 7, as well as the harmonic numbers s from 2 to 70 with a statistical error of +/-6%. The expression can be applied to the polarization analysis and magnetic field strength diagnostic for solar limb events.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	HARD X-RAY ; SOLAR-FLARES ; LIMB FLARE ; ELECTRONS ; EMISSION
收录类别	SCI
语种	英语
WOS记录号	WOS:000173357800045
公开日期	2013-01-29
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/7903]
专题	紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Zhou, AH. Approximate expression of ellipse polarization degree for gyrosynchrotron radiation[J]. CHINESE PHYSICS LETTERS,2002,19(1):144-146.
APA	Zhou, AH.(2002).Approximate expression of ellipse polarization degree for gyrosynchrotron radiation.CHINESE PHYSICS LETTERS,19(1),144-146.
MLA	Zhou, AH."Approximate expression of ellipse polarization degree for gyrosynchrotron radiation".CHINESE PHYSICS LETTERS 19.1(2002):144-146.