Subarcsecond Blobs in Flare-related Coronal Jets

doi:10.3847/1538-4357/aaf391

CORC > 国家天文台 > 中国科学院国家天文台

	Subarcsecond Blobs in Flare-related Coronal Jets
	Zhang, Q. M.1; Ni, L.2,3
刊名	ASTROPHYSICAL JOURNAL
	2019-01-10
卷号	870 期号:2 页码:9
关键词	Sun: corona Sun: flares Sun: magnetic fields Sun: UV radiation
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaf391
英文摘要	In this paper, we report multiwavelength observations of subarcsecond blobs in coronal jets. In AR 12149, a C5.5 circular-ribbon flare occurred at similar to 04:55 UT on 2014 August 24, which consisted of a discrete circular ribbon and a short inner ribbon inside. Two jets (jet1 and jet2) were related to the flare. Jet1 appeared first and experienced untwisting motion during its early propagation along a closed coronal loop. Jet2 appeared 6 minutes later and propagated upward along another closed loop. During its initial phase, a big plasmoid was ejected out of jet2 at a speed of similar to 150 km s(-1). After the flare peak time (05:02 UT), multiple bright and compact blobs appeared in the lower part of jet2, which were observed by the Slit-Jaw Imager (SJI) on board the Interface Region Imaging Spectrograph. The blobs observed by SJI in 1330 angstrom have sizes of 0.'' 45-1.'' 35, nearly 84% of which are subarcsecond (<1 ''). The mean value and standard deviation of the sizes are 0.'' 78 and 0.'' 19, respectively. The velocities of the blobs range from 10 to more than 220 km s(-1), some of which decelerate and disappear during the upward propagation. Three of the blobs had their counterparts in extreme-ultraviolet (EUV) wavelengths observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory spacecraft. The velocities are almost identical in ultraviolet (UV) and EUV wavelengths. We propose that the blobs observed in 1330 angstrom are the cool component (similar to 0.025 MK), while the blobs observed in EUV are the hot component of several MK. In jet1, only one blob was present, with a size of similar to 1 '' and a velocity of similar to 40 km s(-1). We conclude that the blobs are created by the tearing-mode instability of the current sheet at the base or inside the coronal jets. Our results have important implications for uncovering the fine structures of coronal jets and understanding the relationship between the blobs observed at UV and EUV wavelengths.
资助项目	Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; NSFC[11333009] ; NSFC[11790302] ; NSFC[11773079] ; NSFC[11573072] ; NSFC[11729301] ; NSFC[11573064] ; Youth Innovation Promotion Association CAS ; Fund of Jiangsu Province[BK20161618] ; "Strategic Pilot Projects in Space Science" of CAS[XDA15052200] ; "Strategic Pilot Projects in Space Science" of CAS[XDA15320301] ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA201716] ; Western Light of Chinese Academy of Sciences 2014 ; Youth Innovation Promotion Association CAS 2017 ; Applied Basic Research of Yunnan Province in China[2018FB009] ; key Laboratory of Solar Activity[KLSA201812]
WOS关键词	X-RAY JETS ; H-ALPHA SURGES ; MAGNETIC RECONNECTION ; SOLAR-FLARE ; FILAMENT ; EJECTION ; PULSATIONS ; HINODE ; SHEET
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000455991600007
资助机构	Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; NSFC ; NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Fund of Jiangsu Province ; Fund of Jiangsu Province ; "Strategic Pilot Projects in Space Science" of CAS ; "Strategic Pilot Projects in Space Science" of CAS ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Western Light of Chinese Academy of Sciences 2014 ; Western Light of Chinese Academy of Sciences 2014 ; Youth Innovation Promotion Association CAS 2017 ; Youth Innovation Promotion Association CAS 2017 ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; key Laboratory of Solar Activity ; key Laboratory of Solar Activity ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; NSFC ; NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Fund of Jiangsu Province ; Fund of Jiangsu Province ; "Strategic Pilot Projects in Space Science" of CAS ; "Strategic Pilot Projects in Space Science" of CAS ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Western Light of Chinese Academy of Sciences 2014 ; Western Light of Chinese Academy of Sciences 2014 ; Youth Innovation Promotion Association CAS 2017 ; Youth Innovation Promotion Association CAS 2017 ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; key Laboratory of Solar Activity ; key Laboratory of Solar Activity ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; NSFC ; NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Fund of Jiangsu Province ; Fund of Jiangsu Province ; "Strategic Pilot Projects in Space Science" of CAS ; "Strategic Pilot Projects in Space Science" of CAS ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Western Light of Chinese Academy of Sciences 2014 ; Western Light of Chinese Academy of Sciences 2014 ; Youth Innovation Promotion Association CAS 2017 ; Youth Innovation Promotion Association CAS 2017 ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; key Laboratory of Solar Activity ; key Laboratory of Solar Activity ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; NSFC ; NSFC ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Fund of Jiangsu Province ; Fund of Jiangsu Province ; "Strategic Pilot Projects in Space Science" of CAS ; "Strategic Pilot Projects in Space Science" of CAS ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; Western Light of Chinese Academy of Sciences 2014 ; Western Light of Chinese Academy of Sciences 2014 ; Youth Innovation Promotion Association CAS 2017 ; Youth Innovation Promotion Association CAS 2017 ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; key Laboratory of Solar Activity ; key Laboratory of Solar Activity
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24739]
专题	中国科学院国家天文台
通讯作者	Zhang, Q. M.
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210034, Jiangsu, Peoples R China 2.Chinese Acad Sci, Yunnan Observat, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China 3.Natl Astron Observatories, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Q. M.,Ni, L.. Subarcsecond Blobs in Flare-related Coronal Jets[J]. ASTROPHYSICAL JOURNAL,2019,870(2):9.
APA	Zhang, Q. M.,&Ni, L..(2019).Subarcsecond Blobs in Flare-related Coronal Jets.ASTROPHYSICAL JOURNAL,870(2),9.
MLA	Zhang, Q. M.,et al."Subarcsecond Blobs in Flare-related Coronal Jets".ASTROPHYSICAL JOURNAL 870.2(2019):9.