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Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations
Zhao, Jie; Schmieder, Brigitte; Li, Hui; Pariat, Etienne; Zhu, Xiaoshuai; Feng, Li; Grubecka, Michalina; Li, H (reprint author), Key Lab Dark Matter & Space Astron, Purple Mountains Observat, CAS, Nanjing 210008, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2017
Volume836Issue:1Pages:52
ISSN0004-637X
Language英语
KeywordSun: Chromosphere Sun: Magnetic Fields Sun: Transition Region
AbstractBy using a new method of forced-field extrapolation, we study the emerging flux region AR11850 observed by the Interface Region Imaging Spectrograph and Solar Dynamical Observatory. Our results suggest that the bright points(BPs) in this emerging region exhibit responses in lines formed from the upper photosphere to the transition region, which have relatively similar morphologies. They have an oscillation of several minutes according to the Atmospheric Imaging Assembly data at 1600 and 1700 angstrom. The ratio between the BP intensities measured in 1600 and 1700 angstrom filtergrams reveals that these BPs are heated differently. Our analysis of the Helioseismic and Magnetic Imager vector magnetic field and the corresponding topology in AR11850 indicates that the BPs are located at the polarity inversion line and most of them are related to magnetic reconnection or cancelation. The heating of the BPs might be different due to different magnetic topology. We find that the heating due to the magnetic cancelation would be stronger than the case of bald patch reconnection. The plasma density rather than the magnetic field strength could play a dominant role in this process. Based on physical conditions in the lower atmosphere, our forced-field extrapolation shows consistent results between the bright arcades visible in slit-jaw image 1400 angstrom and the extrapolated field lines that pass through the bald patches. It provides. reliable observational evidence for testing the mechanism of magnetic reconnection for the BPs and arcades in the. emerging flux region, as proposed in simulation studies.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6121
Collection空间科学部
Corresponding AuthorLi, H (reprint author), Key Lab Dark Matter & Space Astron, Purple Mountains Observat, CAS, Nanjing 210008, Peoples R China.
Recommended Citation
GB/T 7714
Zhao, Jie,Schmieder, Brigitte,Li, Hui,et al. Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations[J]. ASTROPHYSICAL JOURNAL,2017,836(1):52.
APA Zhao, Jie.,Schmieder, Brigitte.,Li, Hui.,Pariat, Etienne.,Zhu, Xiaoshuai.,...&Li, H .(2017).Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations.ASTROPHYSICAL JOURNAL,836(1),52.
MLA Zhao, Jie,et al."Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations".ASTROPHYSICAL JOURNAL 836.1(2017):52.
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