Results 21 to 30 of about 36,388 (256)
Development of Coronal Holes Index For Study of Coronal Hole Geo-Effectiveness
Journal of Physics: Conference Series, 2022 Abstract Coronal holes are expansion regions in the solar corona with lower density and temperature than their surroundings. Coronal holes have open magnetic field structure that radiates out into interplanetary space as the solar wind.
Anwar Santoso +5 more
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The Astrophysical Journal Letters, 2023 We propose that coronal heating in EUV coronal plumes is weaker, not stronger, than in adjacent nonplume coronal magnetic funnels. This expectation stems from (i) the observation that an EUV plume is born as the magnetic flux at the foot of the plume’s ...
Ronald L. Moore +3 more
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Variations in Daily Maximum Areas and Longitudinal Widths of Solar Coronal Holes in 2017–2020
Universe, 2022 We considered coronal holes as a manifestation of the large-scale magnetic field of the Sun. The main goal of this work was to study the variations in the largest areas and longitudinal widths of solar coronal holes observed daily in the polar and mid ...
Alexandr Riehokainen +6 more
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The Astrophysical Journal, 2023 This paper is dedicated to the new implicit unstructured coronal code COCONUT, which aims at providing fast and accurate inputs for space-weather forecasting as an alternative to empirical models.
Barbara Perri +7 more
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MAGNETIC TOPOLOGY OF CORONAL HOLE LINKAGES [PDF]
The Astrophysical Journal, 2011 32 pages, 10 figures, accepted to ...
Titov, V. S. +4 more
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The Astrophysical Journal Letters, 2023 The omnipresence of transient fluctuations in the solar wind, such as switchbacks (SBs) and small-scale magnetic flux ropes (SMFRs), have been well observed by the in situ observation of Parker Solar Probe (PSP), yet their sources are not clear. Possible
Nengyi Huang +2 more
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Journal of Space Weather and Space Climate, 2021 We discuss the significant implications of three eye-witness drawings of the total solar eclipse on 1706 May 12 in comparison with two on 1715 May 3, for our understanding of space climate change.
Hayakawa Hisashi +5 more
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Characteristics of Low-Latitude Coronal Holes near the Maximum of Solar cycle 24 [PDF]
, 2017 We investigate the statistics of 288 low-latitude coronal holes extracted from SDO/AIA-193 filtergrams over the time range 2011/01/01 to 2013/12/31. We analyse the distribution of characteristic coronal hole properties, such as the areas, mean AIA-193 ...
Heber, B. +6 more
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Numerical Simulation of Coronal Waves Interacting with Coronal Holes. II. Dependence on Alfvén Speed Inside the Coronal Hole [PDF]
The Astrophysical Journal, 2018 Abstract We used our newly developed magnetohydrodynamic (MHD) code to perform 2.5D simulations of a fast-mode MHD wave interacting with coronal holes (CHs) of varying Alfvén speed that result from assuming different CH densities. We find that this interaction leads to effects like reflection, transmission, stationary fronts at the CH ...
Isabell Piantschitsch +6 more
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Australian Journal of Physics, 1983 The dynamics of high speed streams of solar plasma emanating from a coronal hole is investigated by use of a two-fluid model with polytropic equations of state. Steady outflow is considered along a flow tube which has a radial orientation with respect to the Sun, and a cross-sectional area proportional to r' where r is the heliocentric radius and s is ...
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