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Are there local dynamo in solar polar region?

Published online by Cambridge University Press:  24 September 2020

Chunlan Jin Open the ORCID record for Chunlan Jin [Opens in a new window]
Chunlan Jin*
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing100101, China email: mailto:cljin@nao.cas.cn
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Abstract

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Polar magnetic field, as a component produced by the global dynamo, is thought to be the remant of toroidal magnetic field transported poleward from Sun’s active belt. With the improvement of instruments, more and more observations are challenging the viewpoint. Recently, we identify the bipolar magnetic emergences (BMEs) in the polar region, and find that the distribution of the magnetic axes for these BMEs shows random state, which does not follow the Joy’s law of active region. The result implies the possible existence of local dynamo in the solar polar region.

Keywords

Sun: atmosphereSun: magnetic fieldsSun: photospheresunspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S354: Solar and Stellar Magnetic Fields: Origins and Manifestations , June 2019 , pp. 123 - 126
Copyright
© International Astronomical Union 2020

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