Flare Ribbon Expansion and Energy Release

Journal of astrophysics and astronomy

Ayumi Asai1⁴  Kazunari Shibata³  Takaaki Yokoyama¹  Satoshi Masuda²  Masumi Shimojo⁴ 

[1] Department of Earth and Planetary Science, University of Tokyo, Hongo, Bunkyo, Tokyo, 113-0033, Japan.$$;Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa, Aichi 442-8507, Japan.$$;Kwasan and Hida Observatories, Kyoto University, Yamashina, Kyoto 607-8471, Japan.$$;Nobeyama Solar Radio Observatory, Minamisaku, Nagano, 384-1305, Japan.$$

关键词: Sun: activity;    Sun: flares;    chromosphere;    corona;    X-rays;    gamma rays.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We report a detailed examination about the relationship between the evolution of the H𝛼 flare ribbons and the released magnetic energy during the April 10 2001 flare. In the H𝛼 images, several bright kernels are observed in the flare ribbons. We identified the conjugated footpoints, by analyzing the lightcurves at each H𝛼 kernels, and showed their connectivities during the flare. Then, based on the magnetic reconnection model, we calculated quantitatively the released energy by using the photospheric magnetic field strengths and separation speeds of the H𝛼 flare ribbons. Finally, we examined the downward motions which are observed at the H𝛼 kernels. We found that the stronger the red-asymmetry tends to be associated with the brighter the H𝛼 kernel.

【 授权许可】

Unknown