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dc.contributor.authorThrelfall, J.
dc.contributor.authorNeukirch, T.
dc.contributor.authorParnell, Clare Elizabeth
dc.contributor.authorEradat Oskoui, S.
dc.identifier.citationThrelfall , J , Neukirch , T , Parnell , C E & Eradat Oskoui , S 2015 , ' Particle acceleration at a reconnecting magnetic separator ' , Astronomy & Astrophysics , vol. 574 , A7 .
dc.identifier.otherPURE: 157155780
dc.identifier.otherPURE UUID: 5a5460d0-3edc-4d72-9c4b-825dbb4c29ec
dc.identifier.otherScopus: 84921417277
dc.identifier.otherWOS: 000349467000007
dc.identifier.otherORCID: /0000-0002-7597-4980/work/34032284
dc.identifier.otherORCID: /0000-0002-5694-9069/work/73700736
dc.description.abstractWhile the exact acceleration mechanism of energetic particles during solar flares is (as yet) unknown, magnetic reconnection plays a key role both in the release of stored magnetic energy of the solar corona and the magnetic restructuring during a flare. Recent work has shown that special field lines, called separators, are common sites of reconnection in 3D numerical experiments. To date, 3D separator reconnection sites have received little attention as particle accelerators. We investigate the effectiveness of separator reconnection as a particle acceleration mechanism for electrons and protons. We study the particle acceleration using a relativistic guiding-centre particle code in a time-dependent kinematic model of magnetic reconnection at a separator. The effect upon particle behaviour of initial position, pitch angle and initial kinetic energy are examined in detail, both for specific (single) particle examples and for large distributions of initial conditions. The separator reconnection model contains several free parameters and we study the effect of changing these parameters upon particle acceleration, in particular in view of the final particle energy ranges which agree with observed energy spectra.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rights© 2014. ESO. This is an Accepted Manuscript of an article published in Astronomy and Astrophysics on 16 January 2015, available online at:
dc.subjectSun: coronaen
dc.subjectSun: magnetic fieldsen
dc.subjectSun: activityen
dc.subjectAcceleration particlesen
dc.subjectQB Astronomyen
dc.subjectQA Mathematicsen
dc.subjectQC Physicsen
dc.titleParticle acceleration at a reconnecting magnetic separatoren
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorEuropean Commissionen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden

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