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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
2019-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume879Issue:1Pages:10
Corresponding AuthorLi, Y.(yingli@pmo.ac.cn)
AbstractWe 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.
Keywordline: profiles Sun: chromosphere Sun: flares Sun: transition region Sun: UV radiation
DOI10.3847/1538-4357/ab245a
WOS KeywordLOOP RADIATIVE HYDRODYNAMICS ; HIGH TIME RESOLUTION ; IMPULSIVE PHASE ; TRANSITION REGION ; SPECTROGRAPH ; DYNAMICS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000475955000006
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27067
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Y.
Affiliation1.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
Recommended Citation
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.
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