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相关论文: Transverse oscillations of systems of coronal loop…

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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 study transverse fast magnetohydrodynamic waves in a system of two coronal loops modeled as smoothed, dense plasma cylinders in a uniform magnetic field. The collective oscillatory properties of the system due to the interaction between…

天体物理学 · 物理学 2009-11-13 M. Luna , J. Terradas , R. Oliver , J. L. Ballester

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

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 cross sections of solar coronal loops are suggested to be rarely circular. We examine linear kink oscillations in straight, density-enhanced, magnetic cylinders with elliptical cross-sections by solving the three-dimensional…

太阳与恒星天体物理 · 物理学 2020-12-02 Mingzhe Guo , Bo Li , Tom Van Doorsselaere

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…

太阳与恒星天体物理 · 物理学 2012-09-26 Bradley W. Hindman , Rekha Jain

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 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…

太阳与恒星天体物理 · 物理学 2024-04-09 Mingzhe Guo , Tom Van Doorsselaere , Bo Li , Marcel Goossens

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…

太阳与恒星天体物理 · 物理学 2015-05-20 R. J. Morton , M. S. Ruderman

Recent developments in the observation and modelling of kink oscillations of coronal loops have led to heightened interest over the last few years. The modification of the Transverse Density Profile (TDP) of oscillating coronal loops by…

太阳与恒星天体物理 · 物理学 2018-08-13 Christopher Rhys Goddard , Patrick Antolin , David James Pascoe

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…

We explore the possible observational signatures of different types of kink modes (horizontal and vertical oscillations in their fundamental mode and second harmonic) that may arise in coronal loops, with the aim of determining how well the…

天体物理学 · 物理学 2010-11-19 T. J. Wang , S. K. Solanki , M. Selwa

One of the proposed damping mechanisms of coronal (transverse) loop oscillations in the kink-mode is resonant absorption as a result of the Alfven speed variation at the outer boundary of coronal loops. Analytical expressions for the period…

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

In this paper, we apply the Rayleigh-Ritz Variational Scheme for studying the transverse oscillations of a magnetic flux tube. The flux tube is considered in low-$\beta$ solar coronal condition. The perturbations decomposed into…

太阳与恒星天体物理 · 物理学 2019-09-12 N. Fathalian , H. Safari , S. Nasiri

Ever since their detection two decades ago, standing kink oscillations in coronal loops have been extensively studied both observationally and theoretically. Almost all driven coronal loop oscillations (e.g., by flares) are observed to damp…

太阳与恒星天体物理 · 物理学 2019-05-31 C. J. Nelson , A. A. Shukhobodskiy , R. Erdélyi , M. Mathioudakis

We report our multiwavelength observations of two homologous circular-ribbon flares (CRFs) in active region 11991 on 2014 March 5, focusing on the transverse oscillations of an extreme-ultraviolet (EUV) loop excited by the flares. The…

太阳与恒星天体物理 · 物理学 2020-07-01 Q. M. Zhang , J. Dai , Z. Xu , D. Li , L. Lu , K. V. Tam , A. A. Xu

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…

太阳与恒星天体物理 · 物理学 2015-06-15 I. Arregui , A. Asensio Ramos , A. J. Diaz

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

The relatively large-amplitude decaying regime of transverse oscillations of coronal loops has been known for two decades and interpreted in terms of MHD kink modes of cylindrical plasma waveguides. Recent observational analysis has…

太阳与恒星天体物理 · 物理学 2020-01-15 A. N. Afanasyev , T. Van Doorsselaere , V. M. Nakariakov
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