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dc.contributor.authorQiu, Jiong
dc.contributor.authorLongcope, Dana W.
dc.contributor.authorCassak, Paul A.
dc.contributor.authorPriest, Eric R.
dc.identifier.citationQiu , J , Longcope , D W , Cassak , P A & Priest , E R 2017 , ' Elongation of flare ribbons ' , Astrophysical Journal , vol. 838 , no. 1 , 17 .
dc.identifier.otherPURE: 249880033
dc.identifier.otherPURE UUID: 2544fcbd-7ee7-415a-a70b-234c13f3d7c4
dc.identifier.otherScopus: 85016829623
dc.identifier.otherWOS: 000398672800003
dc.identifier.otherORCID: /0000-0003-3621-6690/work/74117731
dc.descriptionJ.Q., D.W.L., and P.A.C. gratefully acknowledge support by NSF SHINE collaborative grant AGS-1460059.en
dc.description.abstractWe present an analysis of the apparent elongation motion of flare ribbons along the polarity inversion line (PIL), as well as the shear of flare loops in several two-ribbon flares. Flare ribbons and loops spread along the PIL at a speed ranging from a few to a hundred km s-1. The shear measured from conjugate footpoints is consistent with the measurement from flare loops, and both show the decrease of shear toward a potential field as a flare evolves and ribbons and loops spread along the PIL. Flares exhibiting fast bidirectional elongation appear to have a strong shear, which may indicate a large magnetic guide field relative to the reconnection field in the coronal current sheet. We discuss how the analysis of ribbon motion could help infer properties in the corona where reconnection takes place.
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2017. The American Astronomical Society. All rights reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at:
dc.subjectMagnetic reconnectionen
dc.subjectSun: activityen
dc.subjectSun: flareen
dc.subjectSun: magnetic fielden
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectAstronomy and Astrophysicsen
dc.subjectSpace and Planetary Scienceen
dc.titleElongation of flare ribbonsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden

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