太阳米波和分米波段斑马纹和纤维爆发的观测研究

Two new solar radio spectrometers which are in metric and decimetric bands have been operated. This project is based on these observations. The main research is zebra pattern bursts and fiber bursts in solar radio fine structures, including two aspects, the first,depending on our new spectral analyzers, we will find some new solar radio bursts and more new fine structures of zebra and fiber bursts. We deal with the observational data and analyse the parameters of zebra pattern bursts, test their theoretical models, we also use these information to diagnose the magnetic field and density in the corona. Especially, based on the multi-wavelength study, we plan to find the evidence to prove that one type of zebra pattern which has the positive, negative and zero frequency drift stripes may be originated from plasmoids motion in the magnetic reconnection current sheet. On the other hand, we will find the relationship of dm fiber bursts with the current sheet, dense loops, or the some coronal wave (such as the small scale EUV waves).

本项目基于云南天文台的两台高时间,高频谱分辨率和高灵敏度的射电频谱仪的观测资料，对已有的斑马纹和纤维爆发理论模型进行验证。此外，结合多波段的观测资料，我们对具有正向、反向和零漂移频率的斑马纹结构进行重点研究，验证我们提出的这类斑马纹结构可能起源于磁重联电流片中的等离子体团等小尺度磁结构的解释。另一方面，分米波段的纤维爆发可能起源于等离子体密度大的日冕结构中，或与小尺度的日冕波动现象有关。我们将结合多波段的观测数据寻找分米波段纤维爆发的起源和其他波段的对应体（例如，小尺度的EUV波等日冕波动现象）。

本项目基于云南天文台的两台高时间，高频率分辨率和高灵敏度的射电频谱仪的观测资料，并结合多波段的观测资料，对具有正向、反向和零漂移频率的斑马纹结构进行重点研究。利用射电暴的频谱变化对磁重联电流片及其中的等离子体团等小尺度结构进行解释。另一方面，对于II型射电暴的断裂结构，进行了观测研究，并给出断裂结构源于CME驱动的激波穿越电流片的观测证据。