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Polarisation of decayless kink oscillations of solar coronal loops View all abstracts by submitter

Valery Nakariakov   Submitted: 2023-08-21 00:30

Decayless kink oscillations of plasma loops in the solar corona may contain an answer to the enigmatic problem of solar and stellar coronal heating. The polarisation of the oscillations gives us a unique information about their excitation mechanisms and energy supply. However, unambiguous determination of the polarisation has remained elusive. Here, we show simultaneous detection of a 4-min decayless kink oscillation from two non-parallel lines-of-sights, separated by about 104 degrees, provided by unique combination of the High Resolution Imager on Solar Orbiter and the Atmospheric Imaging Assembly on Solar Dynamics Observatory. The observations reveal a horizontal or weakly oblique linear polarisation of the oscillation. This conclusion is based on the comparison of observational results with forward modelling of the observational manifestation of various kinds of polarisation of kink oscillations. The revealed polarisation favours the sustainability of these oscillations by quasi-steady flows which may hence supply the energy for coronal heating.

Authors: Zhong, S., Nakariakov, V.M., Kolotkov, D.Y., Chitta, L.P., Antolin, P., Verbeeck, C., Berghmans, D.
Projects: SO/EUI

Publication Status: Nat. Comm. (in press)
Last Modified: 2023-08-23 13:11
Go to main E-Print page  On the three-dimensional relation between the coronal dimming, erupting filament and CME. Case study of the 28 October 2021 X1.0 event  CME Propagation Through the Heliosphere: Status and Future of Observations and Model Development  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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