Results 111 to 120 of about 16,769 (212)
A Unified Picture of Swirl-driven Solar Coronal Heating: Magnetic Energy Supply and Dissipation
The Astrophysical Journal LettersThe coronal heating problem is one of the most critical challenges in solar physics. Recent observations have revealed that small-scale swirls are ubiquitous in the photosphere and chromosphere, suggesting that they may play a significant role in ...
Hidetaka Kuniyoshi +2 more
doaj +1 more source
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
doaj +1 more source
The Uniturbulence and Alfvén Wave Solar Model (UAWSoM) in MPI-AMRVAC
Astronomy & AstrophysicsContext. The coronal heating problem and the generation of the solar wind remain fundamental challenges in solar physics. While approaches based on, e.g., the Alfvén Wave Solar Model (AWSoM) have proven highly successful in reproducing the large-scale ...
McMurdo M. +4 more
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Reduced Thermal Conduction in Solar Coronal Loops
The Astrophysical JournalThermal conduction plays an important role in the energy balance of the solar coronal plasma. In this paper, we present a new method for deriving observational constraints on the density–temperature relationship for coronal loops from the differential ...
M. Asgari-Targhi, A. A. van Ballegooijen
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Thread Separation and Expansion Observed in Multistranded Solar Coronal Loops
The Astrophysical JournalThe theoretical expectation that coronal loops should expand with height contrasts with observations that typically show constant cross sections. We investigate the idea that this discrepancy results from loops being composed of fine threads whose ...
David H. Brooks, Harry P. Warren
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Theoretical studies of the physics of the solar atmosphere [PDF]
Significant advances in our theoretical basis for understanding several physical processes related to dynamical phenomena on the sun were achieved. We have advanced a new model for spicules and fibrils.
Hollweg, Joseph V.
core +1 more source
Research Progress on Solar Supergranulation: Observations, Theories, and Numerical Simulations
UniverseSolar supergranulation is a large-scale convective structure on the solar surface, whose formation mechanism and dynamical properties are closely related to key physical processes such as solar magnetic field evolution, coronal heating, and solar wind ...
Chong Huang, Rui Wang
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Solar transition region and coronal response to heating rate perturbations [PDF]
The solar transition region is in a dynamic state characterized by impulsively upflowing plasma and continually downflowing plasma. Using numerical simulations, the conjecture that the areas of downflowing plasma are simply the base regions of coronal ...
Mariska, John T.
core +1 more source
Collisional damping of surface waves in the solar corona [PDF]
The damping of surface waves by viscosity and heat conduction is evaluated. For the solar corona, it is found that surface waves dissipate efficiently only if their periods are shorter than a few tens of seconds and only if the background magnetic field ...
Gordon, B. E., Hollweg, J. V.
core +1 more source
The Astrophysical JournalWe report seven examples of a long-ignored type of confined solar flare eruption that does not fit the standard model for confined flare eruptions. Because they are confined eruptions, do not fit the standard model, and unexpectedly erupt in ostensibly ...
Ronald L. Moore +4 more
doaj +1 more source