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dc.contributor.authorDe Moortel, Ineke
dc.contributor.authorMcIntosh, Scott
dc.contributor.authorThrelfall, James William
dc.contributor.authorBethge, Christian
dc.contributor.authorLiu, J
dc.date.accessioned2014-05-09T09:01:06Z
dc.date.available2014-05-09T09:01:06Z
dc.date.issued2014-02-10
dc.identifier.citationDe Moortel , I , McIntosh , S , Threlfall , J W , Bethge , C & Liu , J 2014 , ' Potential Evidence for the Onset of Alfvénic Turbulence in Trans-equatorial Coronal Loops ' Astrophysical Journal Letters , vol. 782 , no. 2 , L34 . DOI: 10.1088/2041-8205/782/2/L34en
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 101447974
dc.identifier.otherPURE UUID: 0c99f789-8b23-4d76-9280-b7abda8ba31f
dc.identifier.otherScopus: 84893972494
dc.identifier.urihttp://hdl.handle.net/10023/4740
dc.description.abstractThis study investigates Coronal Multi-channel Polarimeter Doppler-shift observations of a large, off-limb, trans-equatorial loop system observed on 2012 April 10-11. Doppler-shift oscillations with a broad range of frequencies are found to propagate along the loop with a speed of about 500 km s–1. The power spectrum of perturbations travelling up from both loop footpoints is remarkably symmetric, probably due to the almost perfect north-south alignment of the loop system. Compared to the power spectrum at the footpoints of the loop, the Fourier power at the apex appears to be higher in the high-frequency part of the spectrum than expected from theoretical models. We suggest this excess high-frequency power could be tentative evidence for the onset of a cascade of the low-to-mid frequency waves into (Alfvénic) turbulence.en
dc.format.extent6en
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Lettersen
dc.rights© 2014. The American Astronomical Society. All rights reserveden
dc.subjectMagnetohydrodynamics (MHD) – Sunen
dc.subjectAtmosphere - Sunen
dc.subjectCorona - Sunen
dc.subjectOscillations-turbulence-wavesen
dc.subjectQC Physicsen
dc.subject.lccQCen
dc.titlePotential Evidence for the Onset of Alfvénic Turbulence in Trans-equatorial Coronal Loopsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.identifier.doihttps://doi.org/10.1088/2041-8205/782/2/L34
dc.description.statusPeer revieweden


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