Results 81 to 90 of about 10,692 (216)

Coronal and Chromospheric Dynamics of a Coronal Hole Bright Point

open access: yesThe Astrophysical Journal
Data 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   +1 more source

LUCI onboard Lagrange, the next generation of EUV space weather monitoring

open access: yesJournal of Space Weather and Space Climate, 2020
Lagrange eUv Coronal Imager (LUCI) is a solar imager in the Extreme UltraViolet (EUV) that is being developed as part of the Lagrange mission, a mission designed to be positioned at the L5 Lagrangian point to monitor space weather from its source on the ...
West Matthew J.   +9 more
doaj   +1 more source

Coronal Pseudo-Streamer and Bipolar Streamer Observed by SOHO/UVCS in March 2008

open access: yes, 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
core   +1 more source

Low-latitude coronal holes, decaying active regions and global coronal magnetic structure [PDF]

open access: yes, 2013
We study the relationship between decaying active region magnetic fields, coronal holes and the global coronal magnetic structure using Global Oscillations Network Group (GONG) synoptic magnetograms, Solar Terrestrial RElations Observatory (STEREO ...
Haislmaier, Karl, Petrie, Gordon
core   +1 more source

Debye‐Scale Bipolar Structures and Their Role in the Electron Trajectory Instability at the Bow Shock

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract A number of mechanisms have been suggested to operate within the terrestrial bow shock to redistribute energy contained in the incoming solar wind flow. The majority of mechanisms involve the generation of turbulence while some are based on particle motion alone.
Simon N. Walker   +2 more
wiley   +1 more source

Geomagnetic storms and their sources on the sun:the rising phase of the sunspot cycle

open access: yesAntarctic Record, 2013
Solar phenomena, including solar flares and coronal holes, are considered in the context of a NEWS coordinate system, obtained by application of the heliographic and heliomagnetic coordinate systems to the solar latitude and longitude, respectively.
Takao Saito   +4 more
doaj   +1 more source

Out-of-ecliptic studies of coronal holes and their relation to the solar wind [PDF]

open access: yes
The advantages of observing coronal holes of the sun above the solar ecliptic plane by a solar probe are discussed. Also discussed are the size of coronal holes, their temperature, and magnetic fields associated with the holes.
Noyes, R. W.
core   +1 more source

Recent Observations of Plasma and Alfvenic Wave Energy Injection at the Base of the Fast Solar Wind

open access: yes, 2012
We take stock of recent observations that identify the episodic plasma heating and injection of Alfvenic energy at the base of fast solar wind (in coronal holes).
McIntosh, Scott W.
core   +1 more source

A turbulence-driven model for heating and acceleration of the fast wind in coronal holes [PDF]

open access: yes, 2009
A model is presented for generation of fast solar wind in coronal holes, relying on heating that is dominated by turbulent dissipation of MHD fluctuations transported upwards in the solar atmosphere.
A. Verdini   +24 more
core   +8 more sources

Solar Wind Acceleration in Coronal Holes

open access: yes, 2002
This paper reviews the current state of our understanding of high-speed solar wind acceleration in coronal holes. Observations by SOHO, coupled with interplanetary particle measurements going back several decades, have put strong constraints on possible explanations for how the protons, electrons, and minor ions receive their extreme kinetic properties.
openaire   +2 more sources

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