Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS

doi:10.3847/1538-4357/ab245a

	Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS
	Li, Y.1,2 ; Ding, M. D.3; Hong, J.3; Li, H.1 ; Gan, W. Q.1
刊名	ASTROPHYSICAL JOURNAL
	2019-07-01
卷号	879 期号:1 页码:10
关键词	line: profiles Sun: chromosphere Sun: flares Sun: transition region Sun: UV radiation
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab245a
通讯作者	Li, Y.(yingli@pmo.ac.cn)
英文摘要	We present different signatures of chromospheric evaporation in two solar flares observed by the Interface Region Imaging Spectrograph (IRIS). In the B1.6 flare on 2016 December 6 (SOL2016-12-06T10:40), the transition region Si IV line and the chromospheric C II and Mg II lines show blueshifts with low velocities up to 20 km s(-1) at the flare loop footpoints in the rise phase, indicative of a gentle chromospheric evaporation. While in the C1.6 flare on 2015 December 19 (SOL2015-12-19T10:51), the Si IV, CII, and Mg II lines exhibit redshifts with velocities from several to tens of km s(-1) at the footpoints, which might suggest an explosive chromospheric evaporation. Explosive evaporation has been observed in many flares that were captured by IRIS; however, gentle evaporation, especially manifested as blueshifts in the cool Si IV, C II, and Mg II lines, has scarcely been reported. Our results bring some new insights into chromospheric evaporation in the IRIS era.
WOS关键词	LOOP RADIATIVE HYDRODYNAMICS ; HIGH TIME RESOLUTION ; IMPULSIVE PHASE ; TRANSITION REGION ; SPECTROGRAPH ; DYNAMICS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000475955000006
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/27066]
专题	中国科学院紫金山天文台
通讯作者	Li, Y.
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210034, Jiangsu, Peoples R China 2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China 3.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Y.,Ding, M. D.,Hong, J.,et al. Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS[J]. ASTROPHYSICAL JOURNAL,2019,879(1):10.
APA	Li, Y.,Ding, M. D.,Hong, J.,Li, H.,&Gan, W. Q..(2019).Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS.ASTROPHYSICAL JOURNAL,879(1),10.
MLA	Li, Y.,et al."Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS".ASTROPHYSICAL JOURNAL 879.1(2019):10.