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The Bipolar Magnetic Emergence in the Solar Polar Region
Jin,Chunlan1; Zhou,Guiping1; Zhang,Yuzong1; Wang,Jingxiu1,2
2020-01-20
Source PublicationThe Astrophysical Journal Letters
ISSN2041-8205
Volume889Issue:1
AbstractAbstract Due to projection effect and polarization sensitivity, it is still unknown whether the bipolar magnetic emergence (BME) exists in the solar polar region. In this study, combining the magnetic observations from the Helioseismic and Magnetic Imager and imaging observations of the 211 ? waveband from the Atmospheric Imaging Assembly, we try to identify and diagnose the BME. Considering the magnetic evolution and the corresponding intensity variation in the extreme ultraviolet waveband, we find definite events of the BMEs in the solar polar region. In total, we identify more than 300 BMEs in the solar polar region in the whole year from 2010 June to 2011 May. We find that whether on the southern or northern polar region, the leading polarity of the BMEs is almost half-positive and half-negative, and the BMEs’ magnetic axes show random distribution in that direction. These results imply the possible existence of local dynamo in the solar polar region.
KeywordSolar magnetic fields Sunspots Solar activity Solar photosphere Solar dynamo
DOI10.3847/2041-8213/ab65bf
Language英语
WOS IDIOP:2041-8205-889-1-ab65bf
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28534
Collection中国科学院国家天文台
Affiliation1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100101, People’s Republic of China cljin@nao.cas.cn
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China
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GB/T 7714
Jin,Chunlan,Zhou,Guiping,Zhang,Yuzong,et al. The Bipolar Magnetic Emergence in the Solar Polar Region[J]. The Astrophysical Journal Letters,2020,889(1).
APA Jin,Chunlan,Zhou,Guiping,Zhang,Yuzong,&Wang,Jingxiu.(2020).The Bipolar Magnetic Emergence in the Solar Polar Region.The Astrophysical Journal Letters,889(1).
MLA Jin,Chunlan,et al."The Bipolar Magnetic Emergence in the Solar Polar Region".The Astrophysical Journal Letters 889.1(2020).
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