Stangalini, M., Giannattasio, F., Erdélyi, R. et al. (6 more authors) (2017) Polarised kink waves in magnetic elements: evidence for chromospheric helical waves. Astrophysical Journal, 840 (1). 19. ISSN 0004-637X
Abstract
In recent years, new high spatial resolution observations of the Sun's atmosphere have revealed the presence of a plethora of small-scale magnetic elements down to the resolution limit of the current cohort of solar telescopes (~100–120 km on the solar photosphere). These small magnetic field concentrations, due to the granular buffeting, can support and guide several magnetohydrodynamic wave modes that would eventually contribute to the energy budget of the upper layers of the atmosphere. In this work, exploiting the high spatial and temporal resolution chromospheric data acquired with the Swedish 1 m Solar Telescope, and applying the empirical mode decomposition technique to the tracking of the solar magnetic features, we analyze the perturbations of the horizontal velocity vector of a set of chromospheric magnetic elements. We find observational evidence that suggests a phase relation between the two components of the velocity vector itself, resulting in its helical motion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The American Astronomical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | magnetohydrodynamics (MHD); Sun: chromosphere; Sun: oscillations |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/J001430/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/L006316/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/M000826/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/G002207/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/F002327/1 ROYAL SOCIETY 15343 PARTICLE PHYSICS AND ASTRONOMY RESEARCH COUNCIL PP/B501512/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/K003143/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 20 Apr 2017 13:30 |
Last Modified: | 22 Feb 2018 16:25 |
Published Version: | https://doi.org/10.3847/1538-4357/aa6c5e |
Status: | Published |
Publisher: | American Astronomical Society / IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.3847/1538-4357/aa6c5e |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115047 |