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Evolution of coronal hole boundaries observed by SDO

Published online by Cambridge University Press:  27 June 2012

M. Faurobert ,
C. Fang ,
T. Corbard ,
S.H. Yang ,
J. Zhang  and
T. Li
S.H. Yang
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China. e-mail: shuhongyang@nao.cas.cn
J. Zhang
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China. e-mail: shuhongyang@nao.cas.cn
T. Li
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China. e-mail: shuhongyang@nao.cas.cn
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Abstract

With the observations from the Solar Dynamics Observatory, we investigate the boundary evolution of a coronal hole (CH). Small-scale solar activity (e.g., coronal jet) can lead to gradual change of CH boundaries (CHBs). Besides gradual change of CHBs, a quiet Sun region can change into a CH region on a large scale when magnetic fields in the photosphere evolve from mixed-polarities into one-polarity dominance. CH regions can also evolve into quiet regions on a large scale when the underlying photosphere becomes mixed-polarity fields from one-polarity dominated fields.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 55: 4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges , 2012 , pp. 29 - 34
Copyright
© EAS, EDP Sciences 2012

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