| The Gyrosynchrotron Radiation Spectrum in a Nonuniform Source |
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| 引用本文： | Ai-Hua Zhou Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008,. The Gyrosynchrotron Radiation Spectrum in a Nonuniform Source[J]. 中国天文和天体物理学报, 2006, 6(2): 260-264 |
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| 作者姓名： | Ai-Hua Zhou Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 |
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| 作者单位： | Ai-Hua Zhou Purple Mountain Observatory，Chinese Academy of Sciences，Nanjing 210008; |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | Effects of the energy spectral index δ, low energy cutoff E0 and number density N of energetic electrons on gyrosynchrotron spectrum are investigated for a model source with a nonuniform magnetic field. It is found that the flux density Sv of the x-mode and o-mode systematically increase with increasing E0, N and with decreasing δ. The peak frequency of the spectrum, vp, also systematically increases as increasing E0 and N, but it may not depend on δ. The gyrosynchrotron radiation in the nonuniform case is polarized predominately in the x-mode at v ≥ 3 GHz. A sense reversal of circular polarization also occurs but at much lower frequencies (v ≤ 3 GHz). The reversal frequency also increases with increasing E0 and N, but it perhaps is independent of δ.
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| 关 键 词： | 太阳 光谱 辐射 磁场 |
The Gyrosynchrotron Radiation Spectrum in a Nonuniform Source |
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| Ai-Hua Zhou. The Gyrosynchrotron Radiation Spectrum in a Nonuniform Source[J]. Chinese Journal of Astronomy and Astrophysics, 2006, 6(2): 260-264 |
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| Authors: | Ai-Hua Zhou |
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| Affiliation: | Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 |
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| Abstract: | |
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| Keywords: | Sun: flares - Sun: radio radiation |
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