Results 71 to 80 of about 860 (182)

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

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
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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
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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
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Modeling of Condensations in Coronal Loops Produced by Impulsive Heating with Variable Frequencies and Locations

The Astrophysical Journal
We present the results of models of impulsively heated coronal loops using the 1D hydrodynamic Adaptively Refined Godunov Solver code. The impulsive heating events (which we refer to as nanoflares ) are modeled by discrete pulses of energy along the loop.
Therese A. Kucera, James A. Klimchuk, Manuel Luna   +2 more
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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
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Reconnection Nanojets in an Erupting Solar Filament with Unprecedented High Speeds

The Astrophysical Journal Letters
Solar nanojets are small-scale jets generated by component magnetic reconnection, characterized by collimated plasma motion perpendicular to the reconnecting magnetic field lines.
Yuhang Gao, Hui Tian, David Berghmans, Yadan Duan, Tom Van Doorsselaere, Hechao Chen, Emil Kraaikamp   +6 more
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Modeling Time-variable Elemental Abundances in Coronal Loop Simulations

The Astrophysical Journal Letters
Numerous recent X-ray observations of coronal loops in both active regions and solar flares have shown clearly that elemental abundances vary with time.
Jeffrey W. Reep, John Unverferth, Will T. Barnes, Sherry Chhabra   +3 more
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Generation of Surface Sausage Oscillations of a Current Sheet and Propagating Magnetoacoustic Waves by Impulsive Reconnection

The Astrophysical Journal
Magnetic reconnection and magnetohydrodynamic waves may well be both playing a role in coronal heating. In this paper, we simulate reconnection in the corona as a response to the convergence of opposite-polarity magnetic sources at the base of the corona.
Sripan Mondal, A. K. Srivastava, David I. Pontin, Eric R. Priest   +3 more
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The Uniturbulence and Alfvén Wave Solar Model (UAWSoM) in MPI-AMRVAC

Astronomy & Astrophysics
Context. The coronal heating problem and the generation of the solar wind remain fundamental challenges in solar physics. While approaches based on, e.g., the Alfvén Wave Solar Model (AWSoM) have proven highly successful in reproducing the large-scale ...
McMurdo M., Van Doorsselaere T., Magyar N., Banović L., Lim D.   +4 more
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