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Damped transverse oscillations of magnetic loops are routinely observed in the solar corona. This phenomenon is interpreted as standing kink magnetohydrodynamic waves, which are damped by resonant absorption owing to plasma inhomogeneity…

太阳与恒星天体物理 · 物理学 2015-10-28 Roberto Soler , Manuel Luna

The transition of an impulsively excited kink oscillation of a solar coronal loop to an oscillation with a stationary amplitude, i.e., the damping pattern, is determined using the low-dimensional self-oscillation model. In the model, the…

太阳与恒星天体物理 · 物理学 2024-06-12 Valery M. Nakariakov , Yu Zhong , Dmitrii Y. Kolotkov

Recent numerical studies of oscillating flux tubes have established the significance of resonant absorption in the damping of propagating transverse oscillations in coronal loops. The nonlinear nature of the mechanism has been examined…

太阳与恒星天体物理 · 物理学 2017-08-30 K. Karampelas , T. Van Doorsselaere , P. Antolin

We study the generation of transversal oscillations in coronal loops represented as a straight thin flux tube under the effect of an external driver modeling the global coronal EIT wave. We investigate how the generated oscillations depend…

天体物理学 · 物理学 2009-11-13 I. Ballai , M. Douglas , A. Marcu

Standing slow-mode waves have been recently observed in flaring loops by the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO). By means of the coronal seismology technique transport coefficients in hot ($\sim$10…

太阳与恒星天体物理 · 物理学 2018-07-04 Tongjiang Wang , Leon Ofman , Xudong Sun , Sami K Solanki , Joseph M Davila

Magnetic flux tubes in the solar corona support a rich variety of transverse oscillations, which are theoretically interpreted as magnetohydrodynamic (MHD) modes with a fast and/or Alfv\'enic character. In the standard flux tube model made…

太阳与恒星天体物理 · 物理学 2024-12-13 Roberto Soler , Andrew Hillier

We present results revealing microwave pulsations produced in a model of a flaring twisted solar coronal loop, without any external oscillatory driver. Two types of oscillations are identified: slowly-decaying oscillations with a period of…

太阳与恒星天体物理 · 物理学 2022-02-09 C. Smith , M. Gordovskyy , P. K. Browning

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…

太阳与恒星天体物理 · 物理学 2019-09-02 Narges Fathalian , Hossein Safari

We investigate the transverse oscillations of a line-tied multi-stranded coronal loop composed of several parallel cylindrical strands. First, the collective fast normal modes of the loop are found with the T-matrix theory. There is a huge…

太阳与恒星天体物理 · 物理学 2011-02-11 M. Luna , J. Terradas , R. Oliver , J. L. Ballester

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…

太阳与恒星天体物理 · 物理学 2025-03-10 T. J. Duckenfield , D. B. Jess , R. J. Morton , S. Jafarzadeh

Strongly damped Doppler shift oscillations are observed frequently associated with flarelike events in hot coronal loops. In this paper, a review of the observed properties and the theoretical modeling is presented. Statistical measurements…

太阳与恒星天体物理 · 物理学 2014-04-24 Tongjiang Wang

This short review paper gives an overview of recently observed transverse, propagating velocity perturbations in coronal loops. These ubiquitous perturbations are observed to undergo strong damping as they propagate. Using 3D numerical…

太阳与恒星天体物理 · 物理学 2015-10-06 I. De Moortel , D. J. Pascoe , A. N. Wright , A. W. Hood

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…

太阳与恒星天体物理 · 物理学 2015-06-05 Istvan Ballai , Beniamin Orza

Kink oscillations in coronal loops have been extensively studied for their potential contributions to coronal heating and their role in plasma diagnostics through coronal seismology. A key focus is the strong damping of large-amplitude kink…

太阳与恒星天体物理 · 物理学 2025-08-25 Sihui Zhong , Andrew Hillier , Iñigo Arregui

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…

太阳与恒星天体物理 · 物理学 2015-05-27 J. Terradas , I. Arregui , G. Verth , M. Goossens

Context. Recent observations of decayless transverse oscillations have shown two branches in the relationship between periods and loop lengths. One is a linear relationship, interpreted as a standing mode. The other shows almost no…

太阳与恒星天体物理 · 物理学 2024-10-09 Daye Lim , Tom Van Doorsselaere , Valery M. Nakariakov , Dmitrii Y. Kolotkov , Yuhang Gao , David Berghmans

Context. Transverse oscillations of coronal structures are currently intensively studied to explore the associated magnetohydrodynamic wave physics and perform seismology of the local medium. Aims. We make a first attempt to measure the…

太阳与恒星天体物理 · 物理学 2020-07-01 C. R. Goddard , G. Nisticò

The condensations composing coronal rain, falling down along loop-like structures observed in cool chromospheric lines such as H$\alpha$ and \ion{Ca}{2} H, have long been a spectacular phenomenon of the solar corona. However, considered a…

太阳与恒星天体物理 · 物理学 2015-05-28 Patrick Antolin , Erwin Verwichte

In recent years, omni-present transverse waves have been observed in all layers of the solar atmosphere. Coronal loops are often modeled as a collection of individual strands, in order to explain their thermal behaviour and appearance. We…

太阳与恒星天体物理 · 物理学 2016-06-01 N. Magyar , T. Van Doorsselaere

In recent years, a number of numerical studies have been focusing on the significance of the Kelvin-Helmholtz instability (KHI) in the dynamics of oscillating coronal loops. This process enhances the transfer of energy into smaller scales,…

太阳与恒星天体物理 · 物理学 2018-02-28 K. Karampelas , T. Van Doorsselaere