Parametric generation of acoustic-gravity waves by Alfvén waves in the solar atmosphere

2002 ◽  
Vol 28 (5) ◽  
pp. 335-344 ◽  
Author(s):  
M. Yu. Petukhov ◽  
Yu. V. Petukhov
Keyword(s):  
Solar Atmosphere ◽  
Gravity Waves ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Parametric Generation ◽  
Acoustic Gravity Waves

Parametric generation of acoustic-gravity waves in the solar atmosphere

2001 ◽  
Vol 27 (3) ◽  
pp. 186-192 ◽  
Author(s):  
M. Yu. Petukhov ◽  
Yu. V. Petukhov
Keyword(s):  
Solar Atmosphere ◽  
Gravity Waves ◽  
Parametric Generation ◽  
Acoustic Gravity Waves

Estimation of the Energy Flux of Torsional Alfvén Waves in the Lower Solar Atmosphere Based on Measurements of the Doppler Velocities

2021 ◽  
Vol 61 (7) ◽  
pp. 1035-1037
Author(s):  
Yu. T. Tsap ◽  
A. V. Stepanov ◽  
Yu. G. Kopylova ◽  
O. V. Khaneychuk ◽  
T. B. Goldvarg
Keyword(s):  
Solar Atmosphere ◽  
Energy Flux ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Lower Solar Atmosphere

scholarly journals Numerical simulations of the lower solar atmosphere heating by two-fluid nonlinear Alfvén waves

2020 ◽  
Vol 639 ◽  
pp. A45
Author(s):  
B. Kuźma ◽  
D. Wójcik ◽  
K. Murawski ◽  
D. Yuan ◽  
S. Poedts
Keyword(s):  
Magnetic Flux ◽  
Numerical Simulations ◽  
Solar Atmosphere ◽  
Flux Tube ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Magnetic Flux Tube ◽  
Alfvén Waves ◽  
Two Fluid ◽  
Lower Solar Atmosphere

Context. We present new insight into the long-standing problem of plasma heating in the lower solar atmosphere in terms of collisional dissipation caused by two-fluid Alfvén waves. Aims. Using numerical simulations, we study Alfvén wave propagation and dissipation in a magnetic flux tube and their heating effect. Methods. We set up 2.5-dimensional numerical simulations with a semi-empirical model of a stratified solar atmosphere and a force-free magnetic field mimicking a magnetic flux tube. We consider a partially ionized plasma consisting of ion + electron and neutral fluids, which are coupled by ion-neutral collisions. Results. We find that Alfvén waves, which are directly generated by a monochromatic driver at the bottom of the photosphere, experience strong damping. Low-amplitude waves do not thermalize sufficient wave energy to heat the solar atmospheric plasma. However, Alfvén waves with amplitudes greater than 0.1 km s−1 drive through ponderomotive force magneto-acoustic waves in higher atmospheric layers. These waves are damped by ion-neutral collisions, and the thermal energy released in this process leads to heating of the upper photosphere and the chromosphere. Conclusions. We infer that, as a result of ion-neutral collisions, the energy carried initially by Alfvén waves is thermalized in the upper photosphere and the chromosphere, and the corresponding heating rate is large enough to compensate radiative and thermal-conduction energy losses therein.

Are There Alfven Waves in the Solar Atmosphere?

Science ◽  
2007 ◽  
Vol 318 (5856) ◽  
pp. 1572-1574 ◽  
Author(s):  
R. Erdelyi ◽  
V. Fedun
Keyword(s):  
Solar Atmosphere ◽  
Alfven Waves ◽  
Alfvén Waves

scholarly journals Alfven Waves in the Lower Solar Atmosphere

Science ◽  
2009 ◽  
Vol 323 (5921) ◽  
pp. 1582-1585 ◽  
Author(s):  
D. B. Jess ◽  
M. Mathioudakis ◽  
R. Erdelyi ◽  
P. J. Crockett ◽  
F. P. Keenan ◽  
...  
Keyword(s):  
Solar Atmosphere ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Lower Solar Atmosphere
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