| Are Homologous Radio Bursts Driven by Solar Post-Flare Loops？ |
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| 作者姓名： | Min Wang Rui-Xiang Xie Yi-Hua Yan Yu-Ying Liu |
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| 作者单位： | Min Wang1，Rui-Xiang Xie1，Yi-Hua Yan2 and Yu-Ying Liu2 1 National Astronomical Observatories/Yunnan Observatory，Chinese Academy of Sciences，Kunming 650011; 2 National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | Three particularly complex radio bursts (2001 October 19, 2001 April 10 and 2003 October 26) obtained with the spectrometers (0.65-7.6GHz) at the National Astronomical Observatories, Chinese Academy of Sciences (NAOC, Beijing and Yunnan) and other in- struments (NoRH, TRACE and SXT) are presented. They each have two groups of peaks occurring in different frequency ranges (broad-band microwave and narrow-band decimeter wavelengths). We stress that the second group of burst peaks that occurred in the late phase of the flares and associated with post-flare loops may be homologous radio bursts. We think that they are driven by the post-flare loops. In contrast to the time profiles of the radio bursts and the images of coronal magnetic polarities, we are able to find that the three events are caused by the active regions including main single-bipole magnetic structures, which are associated with multipole magnetic structures during the flare evolutions. In particular, we point out that the later decimetric radio bursts are possibly the radio counterparts of the homologous flares (called "homologous radio bursts" by us), which are also driven by the single-bipole mag- netic structures. By examining the evolutions of the magnetic polarities of sources (17GHz), we could presume that the drivers of the homologous radio bursts are new and/or recurring appearances/disappearances of the magnetic polarities of radio sources, and that the triggers are the magnetic reconnections of single-bipole configurations.
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| 关 键 词： | Sun: radio radiation — Sun: magnetic fields |
| 修稿时间： | 2006-08-02 |
Are Homologous Radio Bursts Driven by Solar Post-Flare Loops? |
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| Min Wang Rui-Xiang Xie Yi-Hua Yan Yu-Ying Liu.Are Homologous Radio Bursts Driven by Solar Post-Flare Loops?[J].Chinese Journal of Astronomy and Astrophysics,2007,7(4):477-486. |
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| Authors: | Min Wang Rui-Xiang Xie Yi-Hua Yan Yu-Ying Liu |
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| Abstract: | Three particularly complex radio bursts (2001 October 19, 2001 April 10 and 2003 October 26) obtained with the spectrometers (0.65-7.6 GHz) at the National Astronomical Observatories, Chinese Academy of Sciences (NAOC, Beijing and Yunnan) and other instruments (NoRH, TRACE and SXT) are presented. They each have two groups of peaks occurring in different frequency ranges (broad-band microwave and narrow-band decimeter wavelengths). We stress that the second group of burst peaks that occurred in the late phase of the flares and associated with post-flare loops may be homologous radio bursts. We think that they are driven by the post-flare loops. In contrast to the time profiles of the radio bursts and the images of coronal magnetic polarities, we are able to find that the three events are caused by the active regions including main single-bipole magnetic structures, which are associated with multipole magnetic structures during the flare evolutions. In particular, we point out that the later decimetric radio bursts are possibly the radio counterparts of the homologous flares (called "homologous radio bursts" by us), which are also driven by the single-bipole magnetic structures. By examining the evolutions of the magnetic polarities of sources (17 GHz),we could presume that the drivers of the homologous radio bursts are new and/or recurring appearances/disappearances of the magnetic polarities of radio sources, and that the triggers are the magnetic reconnections of single-bipole configurations. |
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| Keywords: | Sun: radio radiation - Sun: magnetic fields |
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