Results 31 to 40 of about 107,783 (198)

The radial evolution of solar wind speeds [PDF]

, 2011
The WSA-ENLIL model predicts significant evolution of the solar wind speed. Along a flux tube the solar wind speed at 1.0 AU and beyond is found to be significantly altered from the solar wind speed in the outer corona at 0.1 AU, with most of the change ...
Arge, C. N., Hughes, W. J., McGregor, S. L., Odstrcil, D., Schwadron, Nathan A.   +4 more
core   +3 more sources

Modeling the Formation and Evolution of Solar Wind Microstreams: From Coronal Plumes to Propagating Alfvénic Velocity Spikes

The Astrophysical Journal, 2023
We investigate the origin of mesoscale structures in the solar wind called microstreams, defined as enhancements in the solar wind speed and temperature that last several hours.
Bahaeddine Gannouni, Victor Réville, Alexis P. Rouillard   +2 more
doaj   +1 more source

Posteruptive phenomena in coronal mass ejections and substorms: Indicators of a universal process? [PDF]

, 2008
[1] We examine phenomena associated with eruptions in the two different regimes of the solar corona and the terrestrial magnetosphere. We find striking similarities between the speeds of shrinking magnetic field lines in the corona and dipolarization ...
Guild, T. B., Hughes, W. J., Korreck, K. E., Lin, J., Raymond, J., Reeves, K. K., Savage, S., Schwadron, Nathan A., Spence, Harlan E., Webb, D. F., Wiltberger, M.   +10 more
core   +2 more sources

Co-existence of two plasma phases in solar and AGN coronas [PDF]

Serbian Astronomical Journal, 1998
Here we have juxtaposed two distant cosmic locations of the Sun and AGN where neutral hydrogen appears in a close connection with hot coronas. Besides the solar photosphere, chromosphere and prominences where the presence of neutral hydrogen is ...
Kubičela A., Arsenijević J., Popović L.Č., Trajković N., Bon E.   +4 more
doaj   +1 more source

ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications

Journal of Space Weather and Space Climate, 2021
Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ...
Hamini Abdallah, Auxepaules Gabriel, Birée Lionel, Kenfack Guy, Kerdraon Alain, Klein Karl-Ludwig, Lespagnol Patrice, Masson Sophie, Coutouly Lucile, Fabrice Christian, Romagnan Renaud   +10 more
doaj   +1 more source

Tsallis non-extensive statistics, intermittent turbulence, SOC and chaos in the solar plasma. Part two: Solar Flares dynamics

, 2012
In the second part of this study and similarly with part one, the nonlinear analysis of the solar flares index is embedded in the non-extensive statistical theory of Tsallis [1].
Abramenko, Arimitsu, Arimitsu, Arimitsu, Arimitsu, Arimitsu, Arimitsu, Binney, Chang, Chang, Chang, Chen, de Moura, Elsner, Ferri, Frisch, Frisch, G.P. Pavlos, Grassberger, Kolmogorov, Krommes, L.P. Karakatsanis, Lyra, M.N. Xenakis, Marsch, Meneveau, Meneveau, Pavlos, Pavlos, Pavlos, Pavlos, Sano, Shlesinger, Strauss, Takens, Tarasov, Tarasov, Tarasov, Tarasov, Theiler, Theiler, Tsallis, Tsallis, Tsallis, Tsallis, Zaslavsky, Zelenyi, Zhang   +47 more
core   +1 more source

More than mass proportional heating of heavy ions by supercritical collisionless shocks in the solar corona

, 2009
We propose a new model for explaining the observations of more than mass proportional heating of heavy ions in the polar solar corona. We point out that a large number of small scale intermittent shock waves can be present in the solar corona.
Zimbardo, Gaetano
core   +1 more source

The Solar Corona [PDF]

Highlights of Astronomy, 1980
AbstractRecent observations from space have shown that the solar corona is spatially a very structured medium and temporally a very dynamic one. The consequent changes in the current theoretical ideas about coronal physics are reviewed. The role of the magnetic fields in shaping and heating the coronal structures is especially underlined.
openaire   +1 more source

Two Practical Methods for Coronal Intensity Determination

, 2017
Determining the relative brightness of the solar corona is one of the most critical stages in solar eclipse studies. For this purpose, images taken with different exposures and polarization angles in white-light observations are used. The composite image
Çakmak, Hikmet
core   +1 more source

Influence of projection effects on the observed differential rotation rate in the UV corona

Journal of Advanced Research, 2013
Following previous investigations by Giordano and Mancuso [1] and Mancuso and Giordano [2,3] on the differential rotation of the solar corona as obtained through the analysis of the intensity time series of the O VI 1032 Å spectral line observed by the ...
Salvatore Mancuso, Silvio Giordano
doaj   +1 more source