Subsurface flows associated with non-Joy oriented active regions: a case study

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Hernández, Irene González^1 ; Komm, Rudolf^1 ; Driel-Gesztelyi, Lidia Van^2,3,4 ; Baker, Deborah^2 ; Harra, Louise^2 ; Howe, Rachel^5

National Solar Observatory, Tucson, AZ, United States^1

Mullard Space Science Laboratory, University College London, United Kingdom^2

Observatoire de Paris, LESIA, France^3

Konkoly Observatory, Budapest, Hungary^4

School of Physics and Astronomy, University of Birmingham, United Kingdom^5

关键词: Active regions;    Local dynamics;    Local helioseismology;    Ring diagrams;    Solar dynamo;    Solar magnetic fields;    Sub-surfaces;    Subsurface Flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012050/pdf
DOI  :  10.1088/1742-6596/440/1/012050

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Non-Joy oriented active regions (ARs) are a challenge for solar magnetic field modelers. Although significant deviations from Joy's law are relatively rare for simple bipolar ARs, understanding the causes of their particularity could be critical for the big picture of the solar dynamo. We explore the possibility of the sub-surface local dynamics being responsible for the significant rotation of these ARs. We apply the ring-diagram technique, a local helioseismology method, to infer the flows under and surrounding a non-Joy oriented AR and present the results of a case study in this paper.