Results 51 to 60 of about 16,413 (221)
On the Origin of a Broad Quasiperiodic Fast-propagating Wave Train: Unwinding Jet as the Driver
The Astrophysical Journal LettersLarge-scale extreme-ultraviolet waves commonly exhibit as single wave front and are believed to be caused by coronal mass ejections. Utilizing high spatiotemporal resolution imaging observations from the Solar Dynamics Observatory, we present two ...
Xinping Zhou +7 more
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Searching for Rotational X‐Ray Modulation on TIC 277539431
Astronomische Nachrichten, Volume 347, Issue 3, March 2026.ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza +2 more
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Frequency-dependent Evolution of Propagating Intensity Disturbances in Polar Plumes
The Astrophysical JournalQuasiperiodic disturbances in EUV emission intensity, propagating along polar plumes in the solar corona, are frequently observed. Analysis of these propagating disturbances in the 171 Å bandpass of the Solar Dynamics Observatory/Atmospheric Imaging ...
Kyung-Suk Cho +3 more
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Alfvén Wave Conversion and Reflection in the Solar Chromosphere and Transition Region
Physics, 2022 Series solutions are used to explore the mode conversion of slow, Alfvén and fast magnetohydrodynamic waves injected at the base of a two-isothermal-layer stratified atmosphere with a uniform magnetic field, crudely representing the solar chromosphere ...
Paul Cally
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Strong Polar Ionospheric Electron Density Depletion Under Prolonged Northward IMF Bz Condition
Earth and Space Science, Volume 13, Issue 3, March 2026.Abstract Previous studies have primarily focused on high‐latitude ionospheric‐thermospheric (I‐T) variabilities under southward interplanetary magnetic field (IMF) conditions, while rare studies have investigated the I‐T responses to due northward Bz (NBz), especially in the presence of strong IMF By conditions.
Tianyu Cao +3 more
wiley +1 more source
The Astrophysical JournalThe response of a solar coronal plasma loop to an impulsive perturbation, demonstrating the simultaneous formation of guided and leaky fast magnetoacoustic wave trains, is numerically studied.
Mijie Shi +3 more
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Periodic Density Structures Observed in Ulysses Data: First Results
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol +3 more
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Identification of Nonlinear Damping of Transverse Loop Oscillations by KHI-induced Turbulence
The Astrophysical JournalKink 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 oscillations,
Sihui Zhong +2 more
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Alfvén Wave Connection between the Chromosphere and the Corona of the Sun: An Analytical Study
The Astrophysical Journal, 2023 Alfvén waves are closely relevant to the three outstanding problems in the solar corona: coronal heating, solar wind acceleration, and the fractionization of low first ionization potential (FIP) elements.
Jongchul Chae, Kyoung-Sun Lee
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