Results 31 to 40 of about 2,470 (205)
Modeling Solar Coronal Cavities in Streamers
, 2022 The solar corona is home to a variety of violent and dynamic events controlled by the coronal magnetic field, often termed “solar activity” (e.g., solar flares and coronal mass ejections [CMEs]). CMEs are often associated with the eruption of filaments embedded in the lobes of pseudostreamers or helmet streamers.
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Evolution of coronal streamer structure during the rising phase of solar cycle 23 [PDF]
Geophysical Research Letters, 2000 White‐light images of the outer corona recorded with the Large Angle Spectrometric Coronagraph (LASCO) on the Solar and Heliospheric Observatory (SOHO) show a rapid widening of the streamer belt during 1998 and early 1999. The observed streamer structure and its evolution from rotation to rotation are reproduced with a model in which the Thomson ...
Y. ‐M. Wang, N. R. Sheeley, N. B. Rich
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Flux-tube geometry and solar wind speed during an activity cycle [PDF]
, 2016 The solar wind speed at 1 AU shows variations in latitude and in time which reflect the evolution of the global background magnetic field during the activity cycle.
Brun, A. S. +2 more
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The Astrophysical Journal, 2023 Ground level enhancements (GLEs) are extreme solar energetic particle (SEP) events that are of particular importance in space weather. In solar cycle 24, two GLEs were recorded on 2012 May 17 (GLE 71) and 2017 September 10 (GLE 72), respectively, using a
Wenlong Liu +8 more
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The Astrophysical Journal, 2023 We developed a novel global coronal COCONUT (Coolfluid Corona Unstructured) model based on the COOLFluiD code. The steady-state model is predetermined by magnetograms set as boundary conditions, while inside the numerical domain the corona is described ...
Błażej Kuźma +6 more
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Coronal Pseudo-Streamer and Bipolar Streamer Observed by SOHO/UVCS in March 2008
, 2015 The last solar minimum is characterized by several peculiar aspects and by the presence of a complex magnetic topology with two different kinds of coronal streamers: pseudo-streamers and bipolar streamers.
Abbo, Lucia +3 more
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Diagnostics of Coronal Magnetic Fields Through the Hanle Effect in UV and IR Lines [PDF]
, 2016 The plasma thermodynamics in the solar upper atmosphere, particularly in the corona, are dominated by the magnetic field, which controls the flow and dissipation of energy.
Fineschi, S. +4 more
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An estimate of large‐scale solar wind density and velocity profiles in a coronal hole and the coronal streamer belt [PDF]
Journal of Geophysical Research: Space Physics, 1997 With the use of the total electron content data obtained by the Ulysses Solar Corona Experiment (SCE) during the first solar conjunction in summer 1991, two data sets were selected, one associated with a coronal hole and the other associated with coronal streamer belt crossings.
Martin Pätzold +2 more
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Effects of Coronal Mass Ejections on Distant Coronal Streamers
, 2014 The effects of a large coronal mass ejection (CME) on a solar coronal streamer located roughly 90 degrees from the main direction of the CME propagation observed on January 2, 2012 by the SOHO/LASCO coronagraph are analyzed.
Filippov, B. +3 more
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Periodic Density Structures Observed in Ulysses Data: First Results
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol +3 more
wiley +1 more source