Results 11 to 20 of about 1,272,533 (187)
Radio observations of the quiet solar corona
Advances in Space Research, 1994 Abstract Observations of radio emission from the quiet solar atmosphere and the associated emission mechanisms are discussed. Long wavelength observations, with a spatial resolution of ∼1 arc min are ideal for the study of the large scale structure of the corona, including coronal holes, arches, streamers and the base of the heliospheric current ...
Alissandrakis, C. E.
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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. The locations of the quiet-Sun events follow the meso- and supergranulation pattern of the underling photosphere.
Uritsky, Vadim M., Davila, Joseph M.
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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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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.
europepmc +5 more sources
Topological structure of the magnetic solar corona [PDF]
, 2007 The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
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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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MHD turbulence and heating of the open field-line solar corona [PDF]
, 2003 This paper discusses the possibility that heating of the solar corona in open field-line regions emanating from coronal holes is due to a nonlinear cascade, driven by low-frequency or quasi-static magnetohydrodynamic fluctuations.
Dmitruk, Pablo +13 more
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Current sheets in the solar corona : formation, fragmentation and heating [PDF]
, 2011 In this thesis we investigate current sheets in the solar corona. The well known 1D model for the tearing mode instability is presented, before progressing to 2D where we introduce a non-uniform resistivity.
Bowness, Ruth
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