Results 61 to 70 of about 1,149,927 (208)
The Sun's global photospheric and coronal magnetic fields : observations and models [PDF]
, 2012 2012LRSP....9....6M Funding: STFC, the Leverhulme Trust and European Commission’s Seventh Framework Programme (FP7/2007-2013) under the grant agreement SWIFF (project no.
Anthony Yeates +5 more
core +1 more source
The Astrophysical Journal LettersMagnetohydrodynamic waves in coronal loops provide key seismological diagnostics through their characteristic time signatures. While fast and slow magnetoacoustic modes are routinely exploited, the entropy mode, despite being another eigenmode of the ...
Dmitrii Kolotkov +2 more
doaj +1 more source
Behavior of Magnetohydrodynamic Waves in the Viscous Coronal Loops [PDF]
Iranian Journal of Astronomy and AstrophysicsStudying the dynamics of magnetic plasmas in the presence of pressure gradients, gravity, and Lorentz forces is essential for understanding wave generation and propagation in the solar atmosphere and other magnetic environments.
Roza Rezaei, Zahra Fazel
doaj +1 more source
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.Abstract The Potential Field Source Surface (PFSS) extrapolation is a method for estimating the large scale coronal magnetic field from photospheric magnetograms. The source surface serves as the outer boundary of its solution domain, and is typically a spherical surface.
Shiouhe Wang +4 more
wiley +1 more source
Alfvénic Motions Arising from Asymmetric Acoustic Wave Drivers in Solar Magnetic Structures
The Astrophysical Journal, 2023 Alfvénic motions are ubiquitous in the solar atmosphere and their observed properties are closely linked to those of photospheric p-modes. However, it is still unclear how a predominantly acoustic wave driver can produce these transverse oscillations in ...
Samuel J. Skirvin +2 more
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Predicting Geomagnetic Activity in the Ascending and Declining Phases of the Solar Cycle
Space Weather, Volume 24, Issue 8, August 2026.Abstract Most predictions of space climate, that is, the long‐term behavior of the solar‐terrestrial environment, have focused on forecasting the 11‐year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks.
Timo Qvick +2 more
wiley +1 more source
Understanding the Duration of Solar and Stellar Flares at Various Wavelengths
The Astrophysical Journal, 2023 Recent irradiance measurements from numerous heliophysics and astrophysics missions including Solar Dynamics Observatory (SDO), GOES, Kepler, TESS, Chandra, the X-ray Multi-Mirror Mission, and NICER have provided critical input into understanding the ...
Jeffrey W. Reep, Vladimir S. Airapetian
doaj +1 more source
Space Weather, Volume 24, Issue 8, August 2026.Abstract We present the first real‐time predictions of coronal mass ejection (CME) magnetic structure and resulting geomagnetic impact at Earth for two events using far‐upstream observations from Solar Orbiter during March 2024. While our approach assumes idealized conditions for CME propagation and scaling, in situ magnetic field data from upstream ...
Emma E. Davies +8 more
wiley +1 more source
The Astrophysical JournalWe report on a flare-driven coronal rain event observed along postflare loops during the decay phase of an X1.6-class solar flare. Although high-resolution studies of flare-driven coronal rain have been conducted, imaging spectroscopic studies are rare ...
Donguk Song +8 more
doaj +1 more source