Results 11 to 20 of about 36,388 (256)
Living Reviews in Solar Physics, 2009 Coronal holes are the darkest and least active regions of the Sun, as observed both on the solar disk and above the solar limb. Coronal holes are associated with rapidly expanding open magnetic fields and the acceleration of the high-speed solar wind ...
Steven R. Cranmer
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Observational features of equatorial coronal hole jets [PDF]
Annales Geophysicae, 2010 Collimated ejections of plasma called "coronal hole jets" are commonly observed in polar coronal holes. However, such coronal jets are not only a specific features of polar coronal holes but they can also be found in coronal holes appearing at lower ...
G. Nisticò +3 more
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The Dependence of the Peak Velocity of High-Speed Solar Wind Streams as Measured in the Ecliptic by ACE and the STEREO satellites on the Area and Co-Latitude of their Solar Source Coronal Holes [PDF]
J Geophys Res Space Phys, 2018 We study the properties of 115 coronal holes in the time‐range from 2010/08 to 2017/03, the peak velocities of the corresponding high‐speed streams as measured in the ecliptic at 1AU, and the corresponding changes of the Kp index as marker of their geo ...
Heber, Bernd +5 more
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Propagating MHD Waves in Coronal Holes [PDF]
Space Science Reviews, 2010 Coronal holes are the coolest and darkest regions of the solar atmosphere, as observed both on the solar disk and above the solar limb. Coronal holes are associated with rapidly expanding open magnetic fields and the acceleration of the high-speed solar wind.
Banerjee, D, Gupta, GR, Teriaca, L
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Coronal Cells in Coronal Holes: Systematic Analysis and Implications for Coronal Evolution
The Astrophysical JournalUsing advanced processing techniques, we analyze high-cadence, high-resolution extreme-ultraviolet images and show that, throughout the solar cycle, midlatitude coronal holes (CHs) are made up of ubiquitous and space-filling funnel-shaped structures (or ...
Nathalia Alzate +2 more
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Interchange reconnection as the source of the fast solar wind within coronal holes. [PDF]
Nature, 2023 Bale SD +16 more
europepmc +2 more sources
Improvements on coronal hole detection in SDO/AIA images using supervised classification
Journal of Space Weather and Space Climate, 2015 We demonstrate the use of machine learning algorithms in combination with segmentation techniques in order to distinguish coronal holes and filaments in SDO/AIA EUV images of the Sun.
Reiss Martin A. +7 more
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Dynamics of Coronal Hole Boundaries [PDF]
The Astrophysical Journal, 2017 Abstract Remote and in situ observations strongly imply that the slow solar wind consists of plasma from the hot, closed-field corona that is released onto open magnetic field lines. The Separatrix Web theory for the slow wind proposes that photospheric motions at the scale of supergranules are responsible for generating dynamics at ...
A. K. Higginson +4 more
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Characteristics of Ephemeral Coronal Holes [PDF]
The Astrophysical Journal, 2019 Abstract Small-scale ephemeral coronal holes may be a recurring feature on the solar disk but have received comparatively little attention. These events are characterized by compact structures and short total lifetimes, which are substantially less than a solar disk crossing.
A. R. Inglis +4 more
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Can coronal hole spicules reach coronal temperatures? [PDF]
Astronomy & Astrophysics, 2011 We aim with the present study to provide observational evidences on whether coronal hole spicules reach coronal temperatures. We combine multi-instrument co-observations obtained with the SUMER/SoHO and with the EIS/SOT/XRT/Hinode. The analysed three large spicules were found to be comprised of numerous thin spicules which rise, rotate and descend ...
Madjarska, M. S. +2 more
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