Results 1 to 10 of about 14,648 (177)
Spatiotemporal organization of energy release events in the quiet solar corona [PDF]
The Astrophysical Journal, 2014 Using data from STEREO and SOHO spacecraft, we show that temporal organization of energy release events in the quiet solar corona is close to random, in contrast to the clustered behavior of flaring times in solar active regions.
Davila, Joseph M., Uritsky, Vadim M.
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Multifrequency Microwave Imaging of Weak Transients from the Quiet Solar Corona
The Astrophysical Journal, 2023 Understanding the dynamics of the quiet solar corona is important for answering key questions including the coronal heating problem. Multiple studies have suggested small-scale magnetic-reconnection events may play a crucial role.
Surajit Mondal, Bin Chen, Sijie Yu
doaj +3 more sources
Multi-scale statistical analysis of coronal solar activity [PDF]
Nonlinear Processes in Geophysics, 2016 Multi-filter images from the solar corona are used to obtain temperature maps that are analyzed using techniques based on proper orthogonal decomposition (POD) in order to extract dynamical and structural information at various scales.
D. Gamborino +2 more
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Energy Distribution of Micro-events in the Quiet Solar Corona [PDF]
The Astrophysical Journal, 2001 Recent imaging observations of EUV line emissions have shown evidence for frequent flare-like events in a majority of the pixels in quiet regions of the solar corona.
Arnold O. Benz +15 more
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Quiet solar corona: daily images at 8.8–10.7 cm wavelengths
Solar-Terrestrial Physics, 2023 We discuss results of test observations of the 3–6 GHz range array of the Siberian Radio Heliograph (SRH). A method for calibrating brightness temperatures of images was verified using measurements of the brightness temperature of the quiet Sun at a ...
Altyntsev A. T. +2 more
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Relevant heating of the quiet solar corona by Alfvén waves: a result of adiabaticity breakdown. [PDF]
Sci Rep, 2019 AbstractIon heating by Alfvén waves has been considered for long as the mechanism explaining why the solar corona has a temperature several orders of magnitude higher than the photosphere. Unfortunately, as the measured wave frequencies are much smaller than the ion cyclotron frequency, particles were expected to behave adiabatically, impeding a direct
Escande DF, Gondret V, Sattin F.
europepmc +5 more sources
Automated coronal hole identification via multi-thermal intensity segmentation
Journal of Space Weather and Space Climate, 2018 Coronal holes (CH) are regions of open magnetic fields that appear as dark areas in the solar corona due to their low density and temperature compared to the surrounding quiet corona.
Garton Tadhg M. +2 more
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Propagating and Stationary Bright Knots in the Quiet Solar Corona
The Astrophysical JournalSmall-sized localized brightenings are an important candidate for resolving the problem of the solar atmospheric heating. They are spread over the whole solar disk and are suggested to be caused by magnetic reconnection or wave dissipation.
Shaoxuan Tong, Jun Zhang
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On the Impulsive Heating of Quiet Solar Corona [PDF]
The Astrophysical Journal, 2021 AbstractThe solar corona consists of a million degree Kelvin plasma. A complete understanding of this phenomenon demands the study of quiet Sun (QS) regions. In this work, we study QS regions in the 171 Å, 193 Å, and 211 Å passbands of the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, by combining the empirical impulsive ...
Vishal Upendran, Durgesh Tripathi
openaire +2 more sources
Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona
The Astrophysical Journal Letters, 2023 Arch-like loop structures filled with million Kelvin hot plasma form the building blocks of the quiet-Sun corona. Both high-resolution observations and magnetoconvection simulations show the ubiquitous presence of magnetic fields on the solar surface on ...
L. P. Chitta +21 more
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