太阳微波爆发脉动结构及相关物理过程研究

项目名称： 太阳微波爆发脉动结构及相关物理过程研究

项目编号： No.10873021

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 谭宝林

作者单位： 中国科学院国家天文台

项目金额： 39万元

中文摘要： 在本面上项目的支持下，课题承担人主要在太阳微波爆发准周期脉动结构及相关物理过程、其他频谱精细结构的观测和理论研究、宁静日冕密度分布研究和太阳活动长周期行为等方面进行了系统研究，首次在一个耀斑事件中发现微波辐射具有多时间尺度的准周期脉动结构，对该现象的理论分析表明，该耀斑事件本身具有多种时间尺度的磁场重联过程和能量释放过程；提出了一个新的微波斑马纹结构形成模型；发现在一个大耀斑中的快速微波准周期脉动结构的每一个脉冲均由大量毫秒级尖峰爆发或窄带III型爆发群构成的，并提出了微波元爆发概念；基于日全食-日偏食射电频谱观测数据的联合分析，得到了一个新的宁静太阳大气等离子体密度的半经验模型。另外，对太阳活动长周期行为和太阳耀斑非热粒子动力学行为也进行了详细研究。先后在国内外学术期刊发表研究论文17篇，其中包括SCI论文14篇和中文核心期刊论文3篇。到2011年12月止，有7篇论文被SCI他引16次；在国际学术会议上做口头报告6个，张贴报告1个。

中文关键词： 太阳耀斑；太阳射电；准周期脉动结构；等离子体

英文摘要： Under the support of the Funding of NSFC10873021, The research group has finished the studies mainly on the solar microwave quasi-periodic pulsations and the related physical processes, solar radio spectral fine structures, the coronal plasma density model of the quiet Sun, and the long-term behaviors of solar activity. They discovered the microwave quasi-periodic pulsations in multi-timescales with a solar flare event at first time, revealed that the magnetic reconnection and energy releasing associated with the flare are also with multi-timescales; proposed a new model to explain the formation of microwave zebra pattern structures; found the internal structures of millisecond spiky-type III burst clusters on each pulse of fast microwave quasi-periodic pulsation in a strong flare event, and proposed the new concept of microwave elementary burst; and obtained a new quasi-empirical model of the coronal plasma density of the quiet Sun from the joint analyzing of the solar radio broadband spectral observations during the solar full eclipse and partial eclipse. Additionally, they had also made the researches of the long-term behaviors of solar activity and the dynamic processes of the non-thermal particles associated with the solar flares. They published 17 papers, and among them, there are 14 papers published on SCI journals, and the others are published on the Chinese key journals. There are 7 papers cited by the other SCI papers till the end of 2011. They made 6 oral reports and 1 poster in the international academic conferences.

英文关键词： Solar flare;；solar radio； quasi-periodic pulsating structure； plasmas