Results 61 to 70 of about 11,539 (164)

Turbulent Suppression of Alfvénic Wave Resonances in Coronal Loops

The Astrophysical Journal
Alfvénic 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, Richard Morton, Mahboubeh Asgari-Targhi   +2 more
doaj   +1 more source

On the Existence of Long-period Decayless Oscillations in Short Active Region Loops

The Astrophysical Journal
Decayless kink oscillations, characterized by their lack of decay in amplitude, have been detected in coronal loops of varying scales in active regions, the quiet Sun, and coronal holes. Short-period (
Arpit Kumar Shrivastav, Vaibhav Pant, Rohan Kumar, David Berghmans, Tom Van Doorsselaere, Dipankar Banerjee, Elena Petrova, Daye Lim   +7 more
doaj   +1 more source

Differential emission measure of solar nanoflares measured with the SITES algorithm

Solar-Terrestrial Physics
The paper presents the results of a study of capabilities of the SITES algorithm for reconstructing the differential emission measure (DEM) of a source from its radiation in several parts of the electromagnetic spectrum in the context of observing solar ...
Belov S. A., Ledentsov L. S., Zavershinskii D. I., Bogachev S. A.   +3 more
doaj   +1 more source

Statistical Investigation of Wave Propagation in the Quiet-Sun Using IRIS Spectroscopic Observations

The Astrophysical Journal
In this analysis, we use spectroscopic observations of the quiet Sun made by the IRIS instrument and investigate wave propagation. We analyze various spectral lines formed in different atmospheric layers, such as the photosphere, chromosphere, and ...
Kartika Sangal, A. K. Srivastava, P. Kayshap, Ding Yuan, E. Scullion   +4 more
doaj   +1 more source

Application of Deep Learning to the Classification of Stokes Profiles: From the Quiet Sun to Sunspots

The Astrophysical Journal
The morphology of circular polarization profiles from solar spectropolarimetric observations encodes information about the magnetic field strength, inclination, and line-of-sight velocity gradients.
Ryan J. Campbell, M. Mathioudakis, Carlos Quintero Noda, P. H. Keys, D. Orozco Suárez   +4 more
doaj   +1 more source

The magnetism of the very quiet Sun

, 2004
When the polarimetric sensitivity and the angular resolution exceed a threshold, magnetic fields show up almost everywhere on the solar surface. Here I revise the observational properties of the weakest polarization signals, which appear in the InterNetwork (IN) regions. We already have some information on the magnetic field strengths and inclinations,
openaire   +2 more sources

All Quiet on the Quiet Sun [PDF]

Nature, 1968
openaire   +1 more source

Linear Polarization Features in the Quiet-Sun Photosphere: Structure and Dynamics. [PDF]

Sol Phys, 2018
Kianfar S, Jafarzadeh S, Mirtorabi MT, Riethmüller TL.   +3 more
europepmc   +1 more source

The Ubiquity of Twisted Flux Ropes in the Quiet Sun

The Astrophysical Journal Letters
Models and observations have demonstrated that twisted flux ropes (TFRs) play a significant role in the structure and eruptive dynamics of active regions.
Tahar Amari, Aurélien Canou, Marco Velli, Zoran Mikic, Frederic Alauzet, Eric Buchlin, Jean-François Luciani, Jean-Jacques Aly, Lucas A. Tarr   +8 more
doaj   +1 more source

Hinode/EIS Observation of the Alfvénic Fluctuations in the Quiet Sun

The Astrophysical Journal
Alfvénic fluctuations in the corona are regularly observed in EUV imaging and infrared spectroscopic data. We report here on the Doppler velocity fluctuations within the data from the Extreme-Ultraviolet Imaging Spectrometer (EIS) on board Hinode.
Edris Tajfirouze, Richard Morton, Peter R. Young   +2 more
doaj   +1 more source