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KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY
Shen YD(申远灯)1,2,3; Liu Y(刘煜)1,3; Su, JT3,4; Ibrahim, A5; Shen, YD (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2011-07-10
Volume735Issue:2
DOI10.1088/2041-8205/735/2/L43
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Chromosphere Sun: Corona Planets And Satellites: Magnetic Fields
AbstractWe present an observational study of the kinematics and fine structure of an unwinding polar jet, with high temporal and spatial observations taken by the Atmospheric Imaging Assembly on board the Solar Dynamic Observatory and the Solar Magnetic Activity Research Telescope. During the rising period, the shape of the jet resembled a cylinder with helical structures on the surface, while the mass of the jet was mainly distributed on the cylinder's shell. In the radial direction, the jet expanded successively at its western side and underwent three distinct phases: the gradually expanding phase, the fast expanding phase, and the steady phase. Each phase lasted for about 12 minutes. The angular speed of the unwinding motion of the jet and the twist transferred into the outer corona during the eruption are estimated to be 11.1 x 10(-3) rad s(-1) (period = 564 s) and 1.17-2.55 turns (or 2.34-5.1 pi), respectively. On the other hand, by calculating the azimuthal component of the magnetic field in the jet and comparing the free energy stored in the non-potential magnetic field with the jet's total energy, we find that the non-potential magnetic field in the jet is enough to supply the energy for the ejection. These new observational results strongly support the scenario that the jets are driven by the magnetic twist, which is stored in the twisted closed field of a small bipole, and released through magnetic reconnection between the bipole and its ambient open field.
Funding OrganizationNSFC [10933003, 11078004, 11073050] ; MOST [2011CB811400] ; Key Laboratory of Solar Activity of the National Astronomical Observatories of the Chinese Academy of Sciences [KLSA2011-14]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN2041-8205
URL查看原文
Archive Date2011-11-26
WOS IDWOS:000293138000019
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTIONS ; EMERGING FLUX ; SURGE ; REGION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7176
Collection选址与日冕观测组
Corresponding AuthorShen, YD (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China
4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Shen YD,Liu Y,Su, JT,et al. KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,735(2).
APA Shen YD,Liu Y,Su, JT,Ibrahim, A,&Shen, YD .(2011).KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY.ASTROPHYSICAL JOURNAL LETTERS,735(2).
MLA Shen YD,et al."KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY".ASTROPHYSICAL JOURNAL LETTERS 735.2(2011).
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