Photospheric magnetic vortex structures [PDF]
, 2011 Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S. +14 more
core +2 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 +1 more source
Periodic Variations in Visible Light Brightness as Tracers of Fine Coronal Structures
The Astrophysical JournalThe quiescent or dynamic nature of fine-scale raylike features in the Sun corona, observed in visible light, is still an open question. Here, we show that most of the daily and hourly periodic variations in visible light brightness of the high corona (up
Nathalia Alzate, Simone Di Matteo
doaj +1 more source
Commission 10: Solar Activity [PDF]
, 2007 Commission 10 aims at the study of various forms of solar activity, including networks, plages, pores, spots, fibrils, surges, jets, filaments/prominences, coronal loops, flares, coronal mass ejections (CMEs), solar cycle, microflares, nanoflares ...
Benz, A.O. +10 more
core +1 more source
Connecting the Low to High Corona: Propagating Disturbances as Tracers of the Near-Sun Solar Wind
The Astrophysical JournalWe revisit a quiet 14 day period of solar minimum during 2008 January and track substreamer propagating disturbances (PDs) from low heights in STEREO/EUVI to the extended corona through STEREO/COR1 and into STEREO/COR2 along nonradial paths that trace ...
Nathalia Alzate +4 more
doaj +1 more source
Spatial magneto-seismology : effect of density stratification on the first harmonic amplitude profile of transversal coronal loop oscillations [PDF]
, 2007 Context. The new generation of extreme-ultraviolet (EUV) imagers onboard missions such as the Solar Dynamics Observatory (SDO)and Solar Orbiter (SO) will provide the most accurate spatial measurements of post-flare coronal loop oscillations yet.
Erdélyi, R. (Robertus) +7 more
core +1 more source
Turbulent Suppression of Alfvénic Wave Resonances in Coronal Loops
The Astrophysical JournalAlfvénic wave turbulence is a leading mechanism for explaining the heating of the solar corona and the acceleration of the solar wind. Alfvénic waves are observed to be prevalent throughout the inner corona.
Edris Tajfirouze +2 more
doaj +1 more source
A New Feature of the Quiet Sun Corona During Solar Minimum. [PDF]
, 2014 Quiet Sun (QS) loops have received much less attention than active region loops, partly due to the relative difficulty in identifying individual QS loop structures.
Huang, Zhenguang
core +3 more sources
Solar flux emergence : a three-dimensional numerical study [PDF]
, 2008 Flux is continually emerging on the Sun, making its way from the solar interior up into the atmosphere. Emergence occurs on small-scales in the quiet Sun where magnetic fragments emerge, interact and cancel and on large-scales in active regions where ...
Murray, Michelle J.
core +2 more sources
Velocity and Density Fluctuations in the Quiet Sun Corona
The Astrophysical JournalWe investigate the properties and relationship between Doppler velocity fluctuations and intensity fluctuations in the off-limb quiet Sun corona. These are expected to reflect the properties of Alfvénic and compressive waves, respectively.
Michael Hahn +5 more
doaj +1 more source