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Flares and non-potentiality of AR 11158

Published online by Cambridge University Press:  18 July 2013

Qiao Song ,
Jun Zhang ,
Shuhong Yang  and
Yang Liu
Qiao Song
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: qsong@nao.cas.cn
Jun Zhang
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: qsong@nao.cas.cn
Shuhong Yang
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: qsong@nao.cas.cn
Yang Liu
Affiliation:
W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305-4085, USA
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Abstract

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Five non-potential parameters are calculated to investigate the temporal and spatial variations of vector magnetic field in active region 11158. An area that had evident changes of the azimuth of the vector magnetic field was found. The sunspot rotation may lead to an increase of the non-potentiality. Rapid and prominent increases are found in the variations of unsigned helicity.

Keywords

Sun: flaresSun: magnetic fieldsSun: photosphere
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 573 - 574
Copyright
Copyright © International Astronomical Union 2013 

References

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