Results 91 to 100 of about 962 (184)
Propagating Kink Waves in Chromospheric Jetlike Structures and Coronal Plumelets
The Astrophysical JournalCoronal plumes and chromospheric jetlike structures are believed to be highly dynamic. We report the first direct observations of a propagating kink wave in a chromospheric jetlike structure and its associated plumelet structure in the upper corona of ...
Youqian Qi +7 more
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The Astrophysical Journal Supplement SeriesA hybrid machine learning model, which combines a shallow convolutional neural network and a long short-term memory (CNN-LSTM) network, has been developed to automate the detection of kink oscillations in coronal plasma loops within large volumes of high-
Sergey A. Belov +3 more
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The Astrophysical JournalLarge-amplitude decaying kink oscillations of coronal loops are strongly influenced by nonlinear processes such as Kelvin–Helmholtz instability (KHI) and turbulence, although comprehensive theoretical understanding and observational confirmation remain ...
Sihui Zhong +2 more
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Nonlinearly Wave-Wave Interaction Leads to Solar Coronal Heating
Journal of Condensed MatterNonlinear formulation of slow Alfvén wave in magnetized plasma which can be an essential ingredient of the solar space plasma is being studied. Various method has been adopted, mathematical formulation of the magnetohydrodynamic (MHD) waves can interpret the astrophysical phenomena happening in space plasma.
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Dynamics of Slow Solar Wind Emerging from an Equatorial Coronal Hole
The Astrophysical JournalWe present a three-dimensional reduced magnetohydrodynamics model to depict turbulence induced by Alfvén waves within the slow solar wind originating from an open magnetic field positioned in a coronal hole near the solar equator.
M. Asgari-Targhi, K. Fujiki
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Test for Alfven Wave Signatures in a Solar Coronal Hole
The Astrophysical Journal, 2003 Using spectral line observations to study minor ion motions in a solar coronal hole, a test was made for the presence of Alfven waves. From this we conclude that the Alfven wave flux into the upper portion of the hole is not significant. The SOHO/SUMER ultraviolet spectrograph was used to observe 22 coronal ions with masses ranging from 14mH to 56mH ...
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The Astrophysical JournalMagnetic reconnection and magnetohydrodynamic waves may well be both playing a role in coronal heating. In this paper, we simulate reconnection in the corona as a response to the convergence of opposite-polarity magnetic sources at the base of the corona.
Sripan Mondal +3 more
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Observation of Large-scale Kelvin–Helmholtz Instability Wave Driven by a Coronal Mass Ejection
The Astrophysical Journal LettersThe Kelvin–Helmholtz instability (KHI) can occur when there is a relative motion between two adjacent fluids. In the case of magnetized plasma, the shear velocity must exceed the local Alfvén speed for the instability to develop.
Leon Ofman +5 more
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On the Origins of Coronal Alfvénic Waves
The Astrophysical Journal LettersAlfvénic waves are considered a key contributor to the energy flux that powers the Sun’s corona, with theoretical models demonstrating their potential to explain coronal EUV and X-ray emission and the acceleration of the solar wind.
Richard J. Morton, Roberto Soler
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Source Materials and Heating of Alfvénic Slow and Hot Solar Wind Revealed by Heavy Ions
The Astrophysical JournalThis work quantitatively studies the differences of heavy ions among non-Alfvénic slow wind (N-ASSW), classical fast wind (FSW), and Alfvénic slow and hot wind (ASSW and AHSW) by effect size and Kolmogorov–Smirnov statistic.
Shuyi Meng, Shuo Yao
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