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Potential Evidence for the Onset of Alfvénic Turbulence in Trans-equatorial Coronal Loops
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dc.contributor.author | De Moortel, Ineke | |
dc.contributor.author | McIntosh, Scott | |
dc.contributor.author | Threlfall, James William | |
dc.contributor.author | Bethge, Christian | |
dc.contributor.author | Liu, J | |
dc.date.accessioned | 2014-05-09T09:01:06Z | |
dc.date.available | 2014-05-09T09:01:06Z | |
dc.date.issued | 2014-02-10 | |
dc.identifier.citation | De 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 . https://doi.org/10.1088/2041-8205/782/2/L34 | en |
dc.identifier.issn | 2041-8205 | |
dc.identifier.other | PURE: 101447974 | |
dc.identifier.other | PURE UUID: 0c99f789-8b23-4d76-9280-b7abda8ba31f | |
dc.identifier.other | Scopus: 84893972494 | |
dc.identifier.other | ORCID: /0000-0002-1452-9330/work/39526484 | |
dc.identifier.other | WOS: 000331153000021 | |
dc.identifier.uri | https://hdl.handle.net/10023/4740 | |
dc.description.abstract | This 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. | |
dc.format.extent | 6 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal Letters | en |
dc.rights | © 2014. The American Astronomical Society. All rights reserved | en |
dc.subject | Magnetohydrodynamics (MHD) – Sun | en |
dc.subject | Atmosphere - Sun | en |
dc.subject | Corona - Sun | en |
dc.subject | Oscillations-turbulence-waves | en |
dc.subject | QC Physics | en |
dc.subject.lcc | QC | en |
dc.title | Potential Evidence for the Onset of Alfvénic Turbulence in Trans-equatorial Coronal Loops | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | The Leverhulme Trust | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. Applied Mathematics | en |
dc.contributor.institution | University of St Andrews. School of Mathematics and Statistics | en |
dc.identifier.doi | https://doi.org/10.1088/2041-8205/782/2/L34 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | ST/K000950/1 | en |
dc.identifier.grantnumber | en |
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