Torsional oscillations within a magnetic pore in the solar photosphere
Authors
Organisations
Type | Article |
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Original language | English |
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Pages (from-to) | 691-696 |
Number of pages | 6 |
Journal | Nature Astronomy |
Volume | 5 |
Issue number | 7 |
Early online date | 10 May 2021 |
DOI | |
Publication status | Published - 01 Jul 2021 |
Links |
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Permanent link | Permanent link |
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Abstract
Alfvén waves have proven to be important in a range of physical systems due to their ability to transport non-thermal energy over long distances in a magnetized plasma. This property is of specific interest in solar physics, where the extreme heating of the atmosphere of the Sun remains unexplained. In an inhomogeneous plasma such as a flux tube in the solar atmosphere, they manifest as incompressible torsional perturbations. However, despite evidence in the upper atmosphere, they have not been directly observed in the photosphere. Here, we report the detection of antiphase incompressible torsional oscillations observed in a magnetic pore in the photosphere by the Interferometric Bidimensional Spectropolarimeter. State-of-the-art numerical simulations suggest that a kink mode is a possible excitation mechanism of these waves. The excitation of torsional waves in photospheric magnetic structures can substantially contribute to the energy transport in the solar atmosphere and the acceleration of the solar wind, especially if such signatures will be ubiquitously detected in even smaller structures with the forthcoming next generation of solar telescopes.
Documents
- Accepted Manuscript
Accepted author manuscript, 4.35 MB, PDF
Licence: CC BY-NC Show licence
- Supplementary Information
Data, 4.11 MB, PDF
Licence: CC BY Show licence
- Supplementary Videos
Data, 79.4 MB, ZIP
Licence: CC BY Show licence