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dc.contributor.authorMacnamara, Cicely Krystyna
dc.contributor.authorRoberts, Bernard
dc.identifier.citationMacnamara , C K & Roberts , B 2010 , ' Effects of thermal conduction and compressive viscosity on the period ratio of the slow mode ' , Astronomy & Astrophysics , vol. 515 , A41 .
dc.identifier.otherPURE: 241566046
dc.identifier.otherPURE UUID: 7b2d0981-a5ba-487d-8cbc-459360f156ff
dc.identifier.otherScopus: 77953277125
dc.identifier.otherORCID: /0000-0003-4961-6052/work/27162491
dc.descriptionC.K.M. acknowledges financial support from the CarnegieTrust. Discussions with Dr. I. De Moortel and Prof. A. W. Hood are gratefully acknowledgeden
dc.description.abstractAims: Increasing observational evidence of wave modes brings us to a closer understanding of the solar corona. Coronal seismology allows us to combine wave observations and theory to determine otherwise unknown parameters. The period ratio, P1/2P2, between the period P1 of the fundamental mode and the period P2 of its first overtone, is one such tool of coronal seismology and its departure from unity provides information about the structure of the corona. Methods: We consider analytically the effects of thermal conduction and compressive viscosity on the period ratio for a longitudinally propagating sound wave. Results: For coronal values of thermal conduction the effect on the period ratio is negligible. For compressive viscosity the effect on the period ratio may become important for some short hot loops. Conclusions: Damping typically has a small effect on the period ratio, suggesting that longitudinal structuring remains the most significant effect.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rights© 2010, Publisher / the Author(s). This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at /
dc.subjectSun: coronaen
dc.subjectSun: oscillationsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleEffects of thermal conduction and compressive viscosity on the period ratio of the slow modeen
dc.typeJournal articleen
dc.contributor.sponsorPPARC - Now STFCen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.contributor.institutionUniversity of St Andrews. Pure Mathematicsen
dc.description.statusPeer revieweden

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