Results 1 to 10 of about 1,001 (183)

Coronal Waves and Oscillations

Living Reviews in Solar Physics, 2005
Wave and oscillatory activity of the solar corona is confidently observed with modern imaging and spectral instruments in the visible light, EUV, X-ray and radio bands, and interpreted in terms of magnetohydrodynamic (MHD) wave theory.
Nakariakov Valery M., Verwichte Erwin
doaj   +2 more sources

Why “Solar Tsunamis” Rarely Leave Their Imprints in the Chromosphere

The Astrophysical Journal Letters, 2023
Solar coronal waves frequently appear as bright disturbances that propagate globally from the eruption center in the solar atmosphere, just like the tsunamis in the ocean on Earth.
Ruisheng Zheng, Yihan Liu, Wenlong Liu, Bing Wang, Zhenyong Hou, Shiwei Feng, Xiangliang Kong, Zhenghua Huang, Hongqiang Song, Hui Tian, Pengfei Chen, Robertus Erdélyi, Yao Chen   +12 more
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High-order Harmonics of a Kink Wave and a Narrow Quasiperiodic Fast-propagating Wave Train Excited Simultaneously in a Plasma Resonator

The Astrophysical Journal, 2023
We present the observations of multimode kink waves and a narrow quasiperiodic fast-propagating (QFP) wave train in association with a jet on 2011 December 11.
Zhining Qu, Xinping Zhou, Jie Zheng, Linqiao Jiang, Hongbo Li, Hang Yang   +5 more
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The Role of High-frequency Transverse Oscillations in Coronal Heating

The Astrophysical Journal Letters, 2023
Transverse oscillations that do not show significant damping in solar coronal loops are found to be ubiquitous. Recently, the discovery of high-frequency transverse oscillations in small-scale loops has been accelerated by the Extreme Ultraviolet Imager ...
Daye Lim, Tom Van Doorsselaere, David Berghmans, Richard J. Morton, Vaibhav Pant, Sudip Mandal   +5 more
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Standing Sausage Perturbations in Solar Coronal Slabs with Continuous Transverse Density Profiles: Cutoff Wavenumbers, Evanescent Eigenmodes, and Oscillatory Continuum

The Astrophysical Journal, 2023
The lack of observed sausage perturbations in solar active region loops is customarily attributed to the relevance of cutoff axial wavenumbers and the consequent absence of trapped modes (called “evanescent eigenmodes” here).
Zexing Wang, Bo Li, Shao-Xia Chen, Mijie Shi   +3 more
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A Multi-Event Study of Early-Stage SEP Acceleration by CME-Driven Shocks—Sun to 1 AU

Frontiers in Astronomy and Space Sciences, 2022
The solar corona between below 10 solar radii is an important region for early acceleration and transport of solar energetic particles (SEPs) by coronal mass ejection-driven shock waves.
Kamen Kozarev, Mohamed Nedal, Rositsa Miteva, Momchil Dechev, Pietro Zucca   +4 more
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Density Enhancement Streams in The Solar Wind

The Astrophysical Journal Letters, 2023
This Letter describes a new phenomenon on the Parker Solar Probe of recurring plasma density enhancements that have Δ n/n ∼ 10% and that occur at a repetition rate of ∼5 Hz.
F. S. Mozer, O. Agapitov, S. D. Bale, R. Livi, O. Romeo, K. Sauer, I. Y. Vasko, J. Verniero   +7 more
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Impulsive Solar Energetic Particle Events: Extreme-Ultraviolet Waves and Jets

Frontiers in Astronomy and Space Sciences, 2022
Impulsive solar energetic particle (ISEP) events show peculiar elemental composition, with enhanced 3He and heavy-ion abundances, markedly different from our Solar System composition.
Radoslav Bučík
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Estimating the Poynting Flux of Alfvénic Waves in Polar Coronal Holes across Solar Cycle 24

The Astrophysical Journal
Alfvénic waves are known to be prevalent throughout the corona and solar wind. Determining the Poynting flux supplied by the waves is required for constraining their role in plasma heating and acceleration, as well as providing a constraint for Alfvén ...
R. J. Morton, M. J. Weberg, N. Balodhi, J. A. McLaughlin   +3 more
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Alfvénic Motions in a Stratified Open Flux Tube: Transition from Propagating to Locally Standing Motions and Implications for the Kelvin–Helmholtz Instability

The Astrophysical Journal Letters
Standing transverse waves in closed coronal structures have been widely studied as a possible route to energy dissipation, with resonant absorption transferring kink wave energy to localized Alfvénic motions and the Kelvin–Helmholtz instability (KHI ...
Mingzhe Guo, Bo Li, Yuhang Gao, Yao Chen
doaj   +1 more source