NAOC Open IR
Magnetic gradient: a natural driver of solar eruptions
Tan, Bao-Lin1,2; Yan, Yan1; Li, Ting1; Zhang, Yin1; Chen, Xing-Yao1,2
2020-06-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume20Issue:6Pages:12
AbstractIt is well-known that a gradient will inevitably drive a flow. For example, a density-gradient may drive a diffusion flow, an electrical potential-gradient may drive an electric current in plasmas, and so on. What flow will be driven when a magnetic-gradient occurs in solar atmospheric plasmas? Considering the ubiquitous distribution of magnetic-gradient in solar plasma loops, this work demonstrates that the magnetic-gradient pumping (MGP) mechanism is valid, even in the partial ionized solar photosphere and chromosphere as well as in the corona. The magnetic gradient drives energetic particle upflows that carry and convey kinetic energy fromthe underlying atmosphere tomove upwards, accumulate around the looptop and increase the temperature and pressure, produce ballooning instabilities, and finally it leads to magnetic reconnections and eruptions around the looptop. This mechanism may explain the formation of the hot cusp-structures that can be observed above flaring loops in most preflare phases; therefore, the magneticgradient should be a natural driver of solar eruptions. Furthermore, we may also apply this mechanism to explain many other astrophysical phenomena, such as the cold of sunspot and the hot above it, the formation of solar plasma jets, type-II spicule, and fast solar wind above coronal holes, and also the fast plasma jets related to white dwarfs, neutron stars and black holes.
KeywordSun eruptions Sun corona Sun flare
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1088/1674-4527/20/6/90
WOS KeywordENERGY-RELEASE ; EMISSION MEASURES ; DENSITY LIMITS ; ACTIVE-REGION ; HOT-PLASMA ; FLARE ; FIELD ; TEMPERATURES ; EXPRESSIONS ; MODEL
Language英语
Funding ProjectNational Natural Science Foundation of China[11433006] ; National Natural Science Foundation of China[11573039] ; National Natural Science Foundation of China[11661161015] ; National Natural Science Foundation of China[11790301] ; National Natural Science Foundation of China[11973057]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000545669800001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82908
Collection中国科学院国家天文台
Corresponding AuthorTan, Bao-Lin
Affiliation1.Chinese Acad Sci, Lab Solar Activ, Natl Astron Observ, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tan, Bao-Lin,Yan, Yan,Li, Ting,et al. Magnetic gradient: a natural driver of solar eruptions[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(6):12.
APA Tan, Bao-Lin,Yan, Yan,Li, Ting,Zhang, Yin,&Chen, Xing-Yao.(2020).Magnetic gradient: a natural driver of solar eruptions.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(6),12.
MLA Tan, Bao-Lin,et al."Magnetic gradient: a natural driver of solar eruptions".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.6(2020):12.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tan, Bao-Lin]'s Articles
[Yan, Yan]'s Articles
[Li, Ting]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tan, Bao-Lin]'s Articles
[Yan, Yan]'s Articles
[Li, Ting]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tan, Bao-Lin]'s Articles
[Yan, Yan]'s Articles
[Li, Ting]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.