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dc.contributor.authorPascoe, David James
dc.contributor.authorWright, Andrew Nicholas
dc.contributor.authorDe Moortel, Ineke
dc.identifier.citationPascoe , D J , Wright , A N & De Moortel , I 2011 , ' Propagating coupled Alfvén and kink oscillations in an arbitrary inhomogeneous corona ' , Astrophysical Journal , vol. 731 , no. 1 , 73 .
dc.identifier.otherORCID: /0000-0002-1452-9330/work/39526488
dc.identifier.otherORCID: /0000-0002-9877-1457/work/58055408
dc.descriptionD.J.P. acknowledges financial support from STFC. I.D.M. acknowledges support of a Royal Society University Research Fellowship.en
dc.description.abstractObservations have revealed ubiquitous transverse velocity perturbation waves propagating in the solar corona. We perform three-dimensional numerical simulations of footpoint-driven transverse waves propagating in a low β plasma. We consider the cases of distorted cylindrical flux tubes and a randomly generated inhomogeneous medium. When density structuring is present, mode coupling in inhomogeneous regions leads to the coupling of the kink mode to the Alfvén mode. The decay of the propagating kink wave is observed as energy is transferred to the local Alfvén mode. In all cases considered, modest changes in density were capable of efficiently converting energy from the driving footpoint motion to localized Alfv´en modes. We have demonstrated that mode coupling efficiently couples propagating kink perturbations to Alfvén modes in an arbitrary inhomogeneous medium. This has the consequence that transverse footpoint motions at the base of the corona will deposit energy to Alfvén modes in the corona.
dc.relation.ispartofAstrophysical Journalen
dc.subjectMagnetohydrodynamics (MHD)en
dc.subjectSun: atmosphereen
dc.subjectSun: coronaen
dc.subjectSun: magnetic topologyen
dc.subjectSun: oscillationsen
dc.subjectQB Astronomyen
dc.titlePropagating coupled Alfvén and kink oscillations in an arbitrary inhomogeneous coronaen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden

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