Kink Oscillations of Coronal Loops

Nakariakov, V. M., Anfinogentov, S. A., Antolin, Patrick, Jain, R., Kolotkov, D. Y., Kupriyanova, E. G., Li, D., Magyar, N., Nisticò, G., Pascoe, D. J., Srivastava, A. K., Terradas, J., Vasheghani Farahani, S., Verth, G., Yuan, D. and Zimovets, I. V. (2021) Kink Oscillations of Coronal Loops. Space Science Reviews, 217 (6). p. 73. ISSN 0038-6308

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Kink oscillations of coronal loops, i.e., standing kink waves, is one of the most studied dynamic phenomena in the solar corona. The oscillations are excited by impulsive energy releases, such as low coronal eruptions. Typical periods of the oscillations are from a few to several minutes, and are found to increase linearly with the increase in the major radius of the oscillating loops. It clearly demonstrates that kink oscillations are natural modes of the loops, and can be described as standing fast magnetoacoustic waves with the wavelength determined by the length of the loop. Kink oscillations are observed in two different regimes. In the rapidly decaying regime, the apparent displacement amplitude reaches several minor radii of the loop. The damping time which is about several oscillation periods decreases with the increase in the oscillation amplitude, suggesting a nonlinear nature of the damping. In the decayless regime, the amplitudes are smaller than a minor radius, and the driver is still debated. The review summarises major findings obtained during the last decade, and covers both observational and theoretical results. Observational results include creation and analysis of comprehensive catalogues of the oscillation events, and detection of kink oscillations with imaging and spectral instruments in the EUV and microwave bands. Theoretical results include various approaches to modelling in terms of the magnetohydrodynamic wave theory. Properties of kink oscillations are found to depend on parameters of the oscillating loop, such as the magnetic twist, stratification, steady flows, temperature variations and so on, which make kink oscillations a natural probe of these parameters by the method of magnetohydrodynamic seismology.

Item Type: Article
Additional Information: Funding Information: We gratefully acknowledge ISSI-BJ for supporting the workshop on “Oscillatory Processes in Solar and Stellar Coronae”, during which this review was initiated. V.M.N. acknowledges support by the STFC grant ST/T000252/1, and the Russian Scientific Foundation grant 21-12-00195 (in the part describing the decayless oscillations). P.A. acknowledges funding from his STFC Ernest Rutherford Fellowship (No. ST/R004285/2). Numerical computations were carried out on Cray XC50 at the Center for Computational Astrophysics, NAOJ. D.Y.K. thanks STFC for the grant ST/T000252/1, and budgetary funding of Basic Research program II.16. E.G.K. acknowledges the grant of the Russian Foundation for Basic Research No. 18-02-00856. D.L. is supported by the NSFC under grant 11973092. N.M. acknowledges funding through the Newton International Fellowship of the Royal Society (No. R1\182293), and the FWO-Vlaanderen (No. 12T6521N). G.N. acknowledges the support of the CGAUSS project at the University of Göttingen by the German Aerospace Centre (DLR) under grant 50OL1901 and the Rita Levi Montalcini 2017 fellowship funded by the Italian Ministry of Education, University and Research. J.T. acknowledges the support from grant AYA2017-85465-P (MINECO/AEI/FEDER, UE), to the Conselleria d’Innovació, Recerca i Turisme del Govern Balear, and also to IAC3. A.K.S. acknowledges UKIERI (Indo-UK) Research Grant for the support of his scientific research. D.Y. is supported by the National Natural Science Foundation of China (NSFC, 11803005, 11911530690, 41731067) and the Shenzhen Technology Project (JCYJ20180306172239618). I.V.Z. is supported by the budgetary funding of the Ministry of Science and Higher Education of the Russian Federation within the research topic “PLASMA”.
Uncontrolled Keywords: Magnetohydrodynamics, Sun: corona, Sun: waves
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 23 Sep 2021 15:09
Last Modified: 23 Sep 2021 15:15

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