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Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare
Li,Y.1,2,3,4,5; Kelly,M.3; Ding,M. D.2,5; Qiu,J.3; Zhu,X. S.4; Gan,W. Q.1
2017-10-20
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume848Issue:2
AbstractAbstract We present observations of distinct UV spectral properties at different locations during an atypical X-shaped flare (SOL2014-11-09T15:32) observed by the Interface Region Imaging Spectrograph (IRIS). In this flare, four chromospheric ribbons appear and converge at an X-point where a separator is anchored. Above the X-point, two sets of non-coplanar coronal loops approach laterally and reconnect at the separator. The IRIS?slit was located close to the X-point, cutting across some of the flare ribbons and loops. Near the location of the separator, the Si iv 1402.77???line exhibits significantly broadened line wings extending to 200 km s?1 with an unshifted line core. These spectral features suggest the presence of bidirectional flows possibly related to the separator reconnection. While at the flare ribbons, the hot Fe xxi 1354.08???line shows blueshifts and the cool Si iv 1402.77 ?, C ii 1335.71 ?, and Mg ii 2803.52???lines show evident redshifts up to a velocity of 80 km s?1, which are consistent with the scenario of chromospheric evaporation/condensation.
Keywordline: profiles Sun: chromosphere Sun: corona Sun: flares Sun: UV radiation
DOI10.3847/1538-4357/aa89e4
Language英语
WOS IDIOP:0004-637X-848-2-aa89e4
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22812
Collection中国科学院紫金山天文台
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
2.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, China
3.Department of Physics, Montana State University, Bozeman, MT 59717, USA
4.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing 100012, China
5.Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, China
Recommended Citation
GB/T 7714
Li,Y.,Kelly,M.,Ding,M. D.,et al. Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare[J]. The Astrophysical Journal,2017,848(2).
APA Li,Y.,Kelly,M.,Ding,M. D.,Qiu,J.,Zhu,X. S.,&Gan,W. Q..(2017).Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare.The Astrophysical Journal,848(2).
MLA Li,Y.,et al."Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare".The Astrophysical Journal 848.2(2017).
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