Results 1 to 10 of about 14,596 (161)
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, Cranmer Steven R
exaly +10 more sources
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.
Luca Teriaca +2 more
exaly +4 more sources
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
doaj +3 more sources
Coronal and Chromospheric Dynamics of a Coronal Hole Bright Point
The Astrophysical JournalData from the Atmospheric Imaging Assembly (AIA) and the Helioseismic Magnetic Imager on board the Solar Dynamics Observatory and from the Interface Region Imaging Spectograph, are used to study the evolution at different atmospheric layers of a bright ...
Ana Cristina Cadavid, Mari Paz Miralles
doaj +2 more sources
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
openaire +4 more sources
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
doaj +1 more source
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
openaire +2 more sources
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
openaire +1 more source
Magnetic Flux Emergence in a Coronal Hole [PDF]
Solar Physics, 2020 A joint campaign of various space-borne and ground-based observatories, comprising the Japanese Hinode mission (HOP~338, 20\,--\,30~September 2017), the GREGOR solar telescope, and the \textit{Vacuum Tower Telescope} (VTT), investigated numerous targets such as pores, sunspots, and coronal holes.
Judith Palacios +15 more
openaire +4 more sources
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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