Results 11 to 20 of about 427 (166)
Thermal structuring of the quiet solar corona
Astronomy & AstrophysicsContext. The quiet solar atmosphere is populated with plasma loops that are typically observed in the ultraviolet (UV) and extreme-ultraviolet (EUV) wavelengths.
Milanović N. +3 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
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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.
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Probing the Quiet Solar Atmosphere from the Photosphere to the Corona [PDF]
Solar Physics, 2018 We investigate the morphology and temporal variability of a quiet Sun network region in different solar layers. The emission in several EUV spectral lines through both raster and slot time series, recorded by EIS/Hinode is studied along with H$α$ observations and high resolution spectropolarimetric observations of the photospheric magnetic field.
Ioannis Kontogiannis +3 more
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Micro-events in the active and quiet solar corona [PDF]
Advances in Space Research, 2003 The content of hot material in the corona is not constant. Soft X-ray and high-temperature EUV line observations show that new material, apparently heated and evaporated from the chromosphere, is frequently injected into the corona both in active and quiet regions. Active regions are found to exhibit transient brightenings, termed here microflares, due
Benz, Arnold O., Grigis, Paolo C.
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A nanoflare heating model for the quiet solar corona [PDF]
Astronomy & Astrophysics, 2001 11 pages, 7 figures, updated spelling of 1st autor's ...
Mitra-Kraev, U., Benz, A. O.
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Study of Radio Transients from the Quiet Sun during an Extremely Quiet Time
The Astrophysical Journal, 2023 In this work, we study a class of recently discovered meter-wave solar transients referred to as Weak Impulsive Narrowband Quiet Sun Emission (WINQSEs).
Surajit Mondal +2 more
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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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High-frequency Decayless Waves with Significant Energy in Solar Orbiter/EUI Observations
The Astrophysical Journal, 2023 High-frequency wave phenomena present a great deal of interest as one of the possible candidates to contribute to the energy input required to heat the corona as a part of the alternating current heating theory.
Elena Petrova +3 more
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