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dc.contributor.authorPascoe, David James
dc.contributor.authorHood, Alan William
dc.contributor.authorDe Moortel, Ineke
dc.contributor.authorWright, Andrew Nicholas
dc.identifier.citationPascoe , D J , Hood , A W , De Moortel , I & Wright , A N 2013 , ' Damping of kink waves by mode coupling. II. Parametric study and seismology ' , Astronomy & Astrophysics , vol. 551 , A40 .
dc.identifier.otherPURE: 47067459
dc.identifier.otherPURE UUID: 88ca37da-aa54-4c53-90c9-e3509d43fd5f
dc.identifier.otherScopus: 84874085535
dc.identifier.otherORCID: /0000-0002-1452-9330/work/39526494
dc.identifier.otherORCID: /0000-0003-2620-2068/work/58055130
dc.identifier.otherORCID: /0000-0002-9877-1457/work/58055389
dc.description.abstractContext: Recent observations of the corona reveal ubiquitous transverse velocity perturbations that undergo strong damping as they propagate. These can be understood in terms of propagating kink waves that undergo mode coupling in inhomogeneous regions. Aims: The use of these propagating waves as a seismological tool for the investigation of the solar corona depends upon an accurate understanding of how the mode coupling behaviour is determined by local plasma parameters. Our previous work suggests the exponential spatial damping profile provides a poor description of the behaviour of strongly damped kink waves. We aim to investigate the spatial damping profile in detail and provide a guide to the approximations most suitable for performing seismological inversions. Methods: We propose a general spatial damping profile based on analytical results that accounts for the initial Gaussian stage of damped kink waves as well as the asymptotic exponential stage considered by previous authors. The applicability of this profile is demonstrated by a full parametric study of the relevant physical parameters. The implication of this profile for seismological inversions is investigated. Results: The Gaussian damping profile is found to be most suitable for application as a seismological tool for observations of oscillations in loops with a low density contrast. This profile also provides accurate estimates for data in which only a few wavelengths or periods are observed.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rights© 2013, ESO. A&A 551, A40 (2013). Reproduced with permission from the publishers.en
dc.subjectMagnetohydrodynamics (MHD)en
dc.subjectStellar atmosphereen
dc.subjectMagnetic topologyen
dc.subjectStellar oscillationsen
dc.titleDamping of kink waves by mode coupling. II. Parametric study and seismologyen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden

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