Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations

	Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations
	Zhao, Jie 1; Schmieder, Brigitte 2; Li, Hui 1; Pariat, Etienne 2; Zhu, Xiaoshuai3 ; Feng, Li 1,2,4; Grubecka, Michalina 5
刊名	ASTROPHYSICAL JOURNAL
	2017-02-10
卷号	836 期号:1
关键词	Sun: chromosphere Sun: magnetic fields Sun: transition region
英文摘要	By 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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	FORCED FIELD EXTRAPOLATION ; VACUUM-SOLAR-TELESCOPE ; QUIET-SUN ; ACTIVE-REGION ; EMERGING FLUX ; H-ALPHA ; EXPLOSIVE EVENTS ; SDO OBSERVATIONS ; ELLERMAN BOMBS ; IMAGER HMI
收录类别	SCI
语种	英语
WOS记录号	WOS:000397304500004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8241]
专题	国家天文台_太阳物理研究部
作者单位	1.Key Lab Dark Matter & Space Astron, Purple Mountains Observat, CAS, Nanjing 210008, Peoples R China 2.LESIA, Observ Paris, F-92195 Meudon, France 3.Chinese Acad Sci, Key Lab Solar Activ, Natl Astron Observat, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China 5.Univ Wroclaw, Astron Inst, Kopemika 11, PL-51622 Wroclaw, Poland
推荐引用方式 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).
APA	Zhao, Jie.,Schmieder, Brigitte.,Li, Hui.,Pariat, Etienne.,Zhu, Xiaoshuai.,...&Grubecka, Michalina.(2017).Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations.ASTROPHYSICAL JOURNAL,836(1).
MLA	Zhao, Jie,et al."Observational Evidence of Magnetic Reconnection for Brightenings and Transition Region Arcades in IRIS Observations".ASTROPHYSICAL JOURNAL 836.1(2017).