First Determination in the Extended Corona of the 2D Thermal Evolution of a Current Sheet after a Solar Eruption

doi:10.3847/1538-4357/ad2516

	First Determination in the Extended Corona of the 2D Thermal Evolution of a Current Sheet after a Solar Eruption
	Bemporad, Alessandro 9,10; Shi, Guanglu 10,13; Li, Shuting 10,13; Ying, Beili 10,13; Feng, Li 10,13; Lin J(林隽)14; Abbo, Lucia 9; Andretta, Vincenzo 1; Burtovoi, Aleksandr 7; Deppo, Vania Da 3
刊名	ASTROPHYSICAL JOURNAL
	2024-03-01
卷号	964 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad2516
产权排序	第4完成单位
文献子类	Article
英文摘要	For the first time the evolution of the coronal reconfiguration after a coronal mass ejection (CME) was observed by the multichannel Metis Coronagraph on board the ESA-Solar Orbiter mission. The images acquired in visible light (VL) between 3.0 and 5.4 R circle dot show the formation after a CME of a bright elongated radial feature interpreted as a post-CME current sheet (CS). The unique combination of VL and UV images allowed the time evolution of multiple plasma physical parameters inside and outside the CS region to be mapped in 2D for the first time. The CS electron temperature reached peak values higher than 1 MK, more than twice as high as the surrounding corona. An elongated vertical diffusion region, characterized as a region of much higher thermal pressure and lower magnetic pressure, is observed to slowly propagate outward during 13 hr of observations. Inside this region the Alfvenic Mach number is of the order of M A similar or equal to 0.02-0.11, the plasma beta is close to unity, and the level of turbulence is higher than in the surrounding corona, but decreases slowly with time. All these results provide one of the most complete pictures of these features, and support the idea of a magnetic reconnection coupled with turbulence, thus allowing significant heating of the local plasma, despite the weakness of involved coronal magnetic fields in the considered altitude range.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	National Key Research and Development Program of China[2022YFF0503804]; Strategic Priority Research Programme of the Chinese Academy of Sciences[XDA17040507]; NSFC[11933009]; NSFC[11973012]; NSFC[11921003]; NSFC[12203102]; Yunling Scholar Project of the Yunnan Province; Yunnan Province Scientist Workshop of Solar Physics; National Key R&D Program of China[2022YFF0503003]; National Key R&D Program of China[2022YFF0503000]; Foreign Expert Project of the Ministry of Science and Technology of the People's Republic of China[G2022055004L]; ESA Space Weather Service Network-SWESNET[68721/54.61]
WOS关键词	X-RAY-EMISSION ; MASS EJECTION ; WHITE-LIGHT ; MAGNETIC RECONNECTION ; SPECTROSCOPIC OBSERVATIONS ; NUMERICAL EXPERIMENTS ; ACCELERATION REGION ; ELECTRON-DENSITY ; ULTRAVIOLET ; FLARE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001187900700001
资助机构	National Key Research and Development Program of China[2022YFF0503804] ; Strategic Priority Research Programme of the Chinese Academy of Sciences[XDA17040507] ; NSFC[11933009, 11973012, 11921003, 12203102] ; Yunling Scholar Project of the Yunnan Province ; Yunnan Province Scientist Workshop of Solar Physics ; National Key R&D Program of China[2022YFF0503003, 2022YFF0503000] ; Foreign Expert Project of the Ministry of Science and Technology of the People's Republic of China[G2022055004L] ; ESA Space Weather Service Network-SWESNET[68721/54.61]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26748]
专题	云南天文台_太阳物理研究组
作者单位	1.INAF—Osservatorio Astronomico di Capodimonte, Napoli, Italy; 2.Università di Padova—Dip. Fisica e Astronomia "Galileo Galilei," Padova, Italy; 3.CNR—Istituto di Fotonica e Nanotecnologie, Padova, Italy; 4.Dip. di Scienze Pure e Applicate, Università di Urbino, Urbino, Italy; 5.INFN, Sezione di Firenze, Italy; 6.INAF—Osservatorio Astronomico di Trieste, Trieste, Italy; 7.INAF—Osservatorio Astrofisico di Arcetri, Firenze, Italy; 8.Università di Firenze—Dip. Fisica e Astronomia, Firenze, Italy; 9.INAF—Osservatorio Astrofisico di Torino, Pino Torinese, Torino, Italy; alessandro.bemporad@inaf.it; 10.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, People's Republic of China;
推荐引用方式 GB/T 7714	Bemporad, Alessandro,Shi, Guanglu,Li, Shuting,et al. First Determination in the Extended Corona of the 2D Thermal Evolution of a Current Sheet after a Solar Eruption[J]. ASTROPHYSICAL JOURNAL,2024,964(1).
APA	Bemporad, Alessandro.,Shi, Guanglu.,Li, Shuting.,Ying, Beili.,Feng, Li.,...&Uslenghi, Michela.(2024).First Determination in the Extended Corona of the 2D Thermal Evolution of a Current Sheet after a Solar Eruption.ASTROPHYSICAL JOURNAL,964(1).
MLA	Bemporad, Alessandro,et al."First Determination in the Extended Corona of the 2D Thermal Evolution of a Current Sheet after a Solar Eruption".ASTROPHYSICAL JOURNAL 964.1(2024).