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dc.contributor.authorLuna, M.
dc.contributor.authorMoreno-Insertis, F.
dc.contributor.authorPriest, E.
dc.date.accessioned2015-08-12T15:40:01Z
dc.date.available2015-08-12T15:40:01Z
dc.date.issued2015-07-20
dc.identifier.citationLuna , M , Moreno-Insertis , F & Priest , E 2015 , ' Are tornado-like magnetic structures able to support solar prominence plasma? ' , Astrophysical Journal Letters , vol. 808 , no. 1 . https://doi.org/10.1088/2041-8205/808/1/L23en
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 209211267
dc.identifier.otherPURE UUID: d0519fdf-e641-4a77-8df7-6906ff968f47
dc.identifier.otherScopus: 84937794571
dc.identifier.otherWOS: 000358778900023
dc.identifier.otherORCID: /0000-0003-3621-6690/work/74117705
dc.identifier.urihttps://hdl.handle.net/10023/7202
dc.descriptionM. Luna and F. Moreno-Insertis acknowledge support by the Spanish Ministry of Economy and Competitiveness through projects AYA2011-24808 and AYA2014-55078-P. M.L. is also grateful to ERC-2011-StG 277829-SPIA. E.R.P. is grateful to the UK STFC and the Leverhulme Trust for financial support.en
dc.description.abstractRecent high-resolution and high-cadence observations have surprisingly suggested that prominence barbs exhibit apparent rotating motions suggestive of a tornado-like structure. Additional evidence has been provided by Doppler measurements. The observations reveal opposite velocities for both hot and cool plasma on the two sides of a prominence barb. This motion is persistent for several hours and has been interpreted in terms of rotational motion of prominence feet. Several authors suggest that such barb motions are rotating helical structures around a vertical axis similar to tornadoes on Earth. One of the difficulties of such a proposal is how to support cool prominence plasma in almost-vertical structures against gravity. In this work we model analytically a tornado-like structure and try to determine possible mechanisms to support the prominence plasma. We have found that the Lorentz force can indeed support the barb plasma provided the magnetic structure is sufficiently twisted and/or significant poloidal flows are present.
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Lettersen
dc.rights© 2015. The American Astronomical Society. All rights reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://dx.doi.org/10.1088/2041-8205/808/1/L23en
dc.subjectSun: coronaen
dc.subjectSun: filaments, prominencesen
dc.subjectSun: magnetic fieldsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleAre tornado-like magnetic structures able to support solar prominence plasma?en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.identifier.doihttps://doi.org/10.1088/2041-8205/808/1/L23
dc.description.statusPeer revieweden


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