The images fitting and applications between solar coronal images and an analytic solar magnetic field model

• Main Authors: Tsung-yuan Liu, 柳琮源
• Other Authors: 葉永烜
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/35144616538541791648

碩士 === 國立中央大學 === 太空科學研究所 === 95 === The reason why we study solar physics is not only to learn more about the sun and the entire universe, but also to study the effect of space weather on the earth. I introduce an analytic solar magnetic field model which was first proposed by Banaszkiewicz et al. in 1998. I use this model to fit the solar coronal images obtained by the LASCO instrument on the SOHO spacecraft. I examine the structures of the coronal streamers and choose a suitable magnetic field configuration. From an adjustment of the variable coefficient of the model, I can describe how the streamer structure may be caused by a sequence of the active region on the solar surface. After the performance of image processing and model fitting can routine through the solar minimum. I have found that the active regions indeed transform the coronal streamer form a linear shape into a two-lobe structure. And some possible applications are also described.