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

doi:10.3847/1538-4357/ab245a

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	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	The Astrophysical Journal
	2019-07-01
卷号	879 期号:1
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
英文摘要	Abstract 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, C ii, 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.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-879-1-AB245A
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27148]
专题	中国科学院国家天文台
作者单位	1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People’s Republic of China; yingli@pmo.ac.cn 2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing 100012, People’s Republic of China 3.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People’s Republic of 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]. The Astrophysical Journal,2019,879(1).
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.The Astrophysical Journal,879(1).
MLA	Li,Y.,et al."Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS".The Astrophysical Journal 879.1(2019).