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空间等离子体云的回旋同步辐射
Alternative TitleGyrosynchrotron Emission of Space Plasma Clouds
孙伟英; 王传兵; 吴季; 王水; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication空间科学学报
2009
Volume29Issue:2Pages:175-182
ISSN0254-6124
Language中文
Keyword等离子体云 回旋同步辐射 吸收 极化 辐射强度 亮温
AbstractCME在行星际空间传播时,会导致强磁场,高密度等离子体云的出现.回旋同步辐射是此类等离子体的一种主要的射电辐射机制,且携带行星际磁场的重要信息.本文重点探讨了光深Tv≤1时回旋同步辐射的发射,吸收及极化特性,包括热电子,非热电子,投掷角各向同性,投掷角各向异性等离子体云的回旋同步辐射过程的研究分析.在此基础上,推导了考虑折射指数情况下,辐射强度,辐射亮温的表达式.
Other AbstractThe high density plasma clouds with strong magnetic field will appear as CMEs prop-agating in the interplanetary space. The plasma clouds radiate electromagnetic wave in radio wave band.In order to study the characteristics of CME propagation, the gyrosynchrotron emission mech-anism, which is the main radio radiation mechanism of the plasma clouds, is studied. The physical parameter of the plasma clouds (e.g.electron density,electron temperature, magnetic field and en-ergy distribution)inside the CMEs can be derived according to the emission intensity or brightness temperature of them.In this paper,the emission,absorption and polarization chasa,cteristics of gyrosynchrotron emission as the optical depth are studied. The gyrosynchrotron emission process of isotropy and anisotropy plasma clouds with thermal a,nd nonthermal electrons are also studied and summarized.Moreover,the expression of gyrosynchrotron emission intensity and brightness temperature is also provided as the refractive index is not equal to 1.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1944
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
孙伟英,王传兵,吴季,等. 空间等离子体云的回旋同步辐射[J]. 空间科学学报,2009,29(2):175-182.
APA 孙伟英,王传兵,吴季,王水,&北京8701信箱.(2009).空间等离子体云的回旋同步辐射.空间科学学报,29(2),175-182.
MLA 孙伟英,et al."空间等离子体云的回旋同步辐射".空间科学学报 29.2(2009):175-182.
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