Are there local dynamo in solar polar region?

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 mag...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2019-06, Vol.15 (S354), p.123-126
Main Author: Jin, Chunlan
Format: Article
Language:English
Subjects:
Astronomy
Belt conveyors
Contributed Papers
Magnetic fields
Polar environments
Solar magnetic field
Winter
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Summary: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.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921320001428