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Kink oscillations are frequently observed in coronal loops. This work aims to numerically clarify the influence of loop curvature on horizontally and vertically polarized kink oscillations. Working within the framework of ideal MHD, we…

Solar and Stellar Astrophysics · Physics 2024-04-09 Mingzhe Guo , Tom Van Doorsselaere , Bo Li , Marcel Goossens

Loops of magnetic field in the corona are observed to oscillate and these oscillations have been posited to be the superposition of resonant kink waves. To date, most analyses of these oscillations have concentrated on calculating the…

Solar and Stellar Astrophysics · Physics 2012-09-26 Bradley W. Hindman , Rekha Jain

Kink oscillations are ubiquitously observed in solar coronal loops, their understanding being crucial in the contexts of coronal seismology and atmospheric heating. We study kink modes supported by a straight coronal loop embeded in an…

Solar and Stellar Astrophysics · Physics 2024-02-20 Mijie Shi , Bo Li , Shengju Yuan

The collective transverse coronal loop oscillations seem to be detected in the observational studies. In this regard, Luna et al. (2009, ApJ, 692, 1582) modeled the collective kinklike normal modes of several cylindrical loops system using…

Solar and Stellar Astrophysics · Physics 2019-09-02 Narges Fathalian , Hossein Safari

Using full three-dimensional magnetohydrodynamic numerical simulations, we study the effects of magnetic field sigmoidity or helicity on the properties of the fundamental kink oscillation of solar coronal loops. Our model consists of a…

Solar and Stellar Astrophysics · Physics 2020-05-20 N. Magyar , V. M. Nakariakov

This paper separately evaluates the effects of inclination and asymmetry of solar coronal loops on the resonant absorption of kink magnetohydrodynamic (MHD) oscillations. We modelled a typical coronal loop by a straight and axisymmetric…

Solar and Stellar Astrophysics · Physics 2021-04-06 Sirwan Amiri , Kayoomars Karami , Zanyar Ebrahimi

Kink oscillations of a coronal loop are observed and studied in detail because they provide a unique probe into the structure of coronal loops through MHD seismology and a potential test of coronal heating through the phase-mixing of…

Solar and Stellar Astrophysics · Physics 2018-08-29 P. Pagano , D. J. Pascoe , I. De Moortel

The detection of multiple mode harmonic kink oscillations in coronal loops enables to obtain information on coronal density stratification and magnetic field expansion using seismology inversion techniques. The inference is based on the…

Solar and Stellar Astrophysics · Physics 2015-06-15 I. Arregui , A. Asensio Ramos , A. J. Diaz

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 influence of longitudinal structuring on the fast kink modes of coronal loops is investigated. Analytical dispersion relations and mode profiles are derived for the second-order ordinary differential equation governing the z- component…

Astrophysics · Physics 2008-02-12 N. Dadashi , H. Safari , S. Nasiri , Y. Sobouti

Understanding the effects of the lower solar atmosphere on the spectrum of standing kink oscillations of coronal loops, in both the decaying and decayless regime, is essential for developing more advanced tools for coronal seismology. We…

Solar and Stellar Astrophysics · Physics 2025-01-07 Konstantinos Karampelas , Daye Lim , Tom Van Doorsselaere , Yuhang Gao

Alfv\'enic waves have gained renewed interest since the existence of ubiquitous propagating kink waves were discovered in the corona. {It has long been suggested that Alfv\'enic} waves play an important role in coronal heating and the…

Solar and Stellar Astrophysics · Physics 2019-05-15 Ajay K. Tiwari , Richard J. Morton , Stephane Régnier , James A. McLaughlin

We report the observation of the first two harmonics of the horizontally polarized kink waves excited in a coronal loop system lying at south-east of AR 11719 on 2013 April 11. The detected periods of the fundamental mode ($P_1$), its first…

Solar and Stellar Astrophysics · Physics 2015-06-23 Y. Guo , R. Erdélyi , A. K. Srivastava , Q. Hao , X. Cheng , P. F. Chen , M. D. Ding , B. N. Dwivedi

Context. In the coronal open-field regions, such as coronal holes, there are many transverse waves propagating along magnetic flux tubes, generally interpreted as kink waves. Previous studies have highlighted their potential in coronal…

Solar and Stellar Astrophysics · Physics 2024-09-18 Yuhang Gao , Tom Van Doorsselaere , Hui Tian , Mingzhe Guo , Konstantinos Karampelas

We investigate the standing kink modes of a cylindrical model of coronal loops. The density is stratified along the loop axis and changes discontinuously at the surface of the cylinder. The periods and mode profiles are studies with their…

Astrophysics · Physics 2007-05-23 H. Safari , S. Nasiri , Y. Sobouti

We study non-axisymmetric oscillations of a straight magnetic tube with an elliptic cross-section and density varying along the tube. The governing equations for kink and fluting modes in the thin tube approximation are derived. We found…

Solar and Stellar Astrophysics · Physics 2015-05-20 R. J. Morton , M. S. Ruderman

There are ubiquitous flows observed in the solar atmosphere of sub-Alfv\'{e}nic speeds, however after flaring and coronal mass ejection events flows can become Alfv\'{e}nic. In this Letter, we derive an expression for the standing kink mode…

Solar and Stellar Astrophysics · Physics 2015-05-27 J. Terradas , I. Arregui , G. Verth , M. Goossens

We investigate the nature of transverse kink oscillations of loops expanding through the solar corona and how can oscillations be used to diagnose the plasma parameters and the magnetic field. In particular, we aim to analyse how the…

Solar and Stellar Astrophysics · Physics 2015-06-05 Istvan Ballai , Beniamin Orza

Coronal oscillations offer insight into energy transport and driving in the solar atmosphere. Knowing its polarisation state helps constrain a wave's displacement and velocity amplitude, improving estimates of wave energy flux and…

Solar and Stellar Astrophysics · Physics 2025-03-10 T. J. Duckenfield , D. B. Jess , R. J. Morton , S. Jafarzadeh

We study the collective kinklike normal modes of a system of several cylindrical loops using the T-matrix theory. Loops that have similar kink frequencies oscillate collectively with a frequency which is slightly different from that of the…

Astrophysics · Physics 2011-02-11 M. Luna , J. Terradas , R. Oliver , J. L. Ballester
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