Results 91 to 100 of about 2,789 (225)

Modeling multiphase plasma in the corona: prominences and rain

Living Reviews in Solar Physics
We review major achievements in our understanding of multiphase coronal plasma, where cool-dense and hot-tenuous matter coexists, brought about by advances in modeling and theory, inspired by observations.
Rony Keppens, Yuhao Zhou, Chun Xia
doaj   +1 more source

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

, 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 upward in the solar atmosphere. Scale-separated transport equations include large-scale
Dmitruk, Pablo, Matthaeus, William H., Dmitruk, P., M. Velli, Verdini, Andrea, Velli, Marco, Matthaeus, W. H., A. Verdini, Velli, M., Verli, M., Oughton, Sean, S. Oughton, Verdini, A., P. Dmitruk, W. H. Matthaeus, Oughton, S., Matthaeus, W.H.,

Dmitruk, P.

, Dmitruk, Pablo Ariel   +18 more
core   +1 more source

3D MHD Simulations of Coronal Loops Heated via Magnetic Braiding. I. Continuous Driving

The Astrophysical Journal
The nature and detailed properties of the heating of the million-degree solar corona are important issues that are still largely unresolved. Nanoflare heating might be dominant in active regions and quiet Sun, although direct signatures of such small ...
G. Cozzo, Paola Testa, J. Martinez-Sykora, F. Reale, P. Pagano, F. Rappazzo, V. Hansteen, B. De Pontieu, A. Petralia, E. Alaimo, F. Fiorentino, F. D’Anca, L. Sciortino, M. Todaro, U. Lo Cicero, M. Barbera   +15 more
doaj   +1 more source

Formation of magnetic flux tubes in cylindrical wedge geometry [PDF]

, 2012
Three-dimensional (3D) MHD numerical simulations have not been able to demonstrate convincingly the spontaneous formation of large vertical flux tubes.
Hurlburt, Neal, Botha, G.J.J., Hurlburt, N. E., Botha, Gert, Rucklidge, A.M., Rucklidge, A. M., Botha, G. J. J., Hurlburt, N.E., Rucklidge, Alistair   +8 more
core   +1 more source

How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?

The Astrophysical Journal
The corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy.
K. J. Li, J. C. Xu, W. Feng, J. L. Xie, X. J. Shi, L. H. Deng   +5 more
doaj   +1 more source

Zone of Preferential Heating for Minor Ions in the Solar Wind

The Astrophysical Journal
The properties of minor ions in the solar wind are important indicators of the state of the solar corona and the heating processes it undergoes as it expands.
Janelle Holmes, Justin Kasper, Kristopher G. Klein, Susan T. Lepri, Jim M. Raines   +4 more
doaj   +1 more source

Steady-state Heating of Diffuse Coronal Plasma in a Solar Active Region

The Astrophysical Journal
The solar corona is much hotter than lower layers of the solar atmosphere—the photosphere and chromosphere. The coronal temperature is up to 1 MK in quiet Sun areas, while up to several megakelvins in active regions, which implies a key role of the ...
Gregory D. Fleishman, Alexey A. Kuznetsov, Gelu M. Nita   +2 more
doaj   +1 more source

Solar Coronal Heating and Limb Effect

, 2013
7 pages ...
openaire   +2 more sources

Topological structure of the magnetic solar corona

, 2007
The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
core  

Five-minute Periodicities in the Population of Solar Coronal Brightenings

The Astrophysical Journal
The population of small-scale brightenings observed across broad regions of the quiet-Sun (QS) corona shows coherent strong periodicities of ≈5 minutes and amplitudes of 20% to 30% of the mean.
Huw Morgan, Yeghiazar Taroyan, Harshita Gandhi, Llŷr Humphries, Shaktivel Pillai   +4 more
doaj   +1 more source