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

scholarly journals Spatial variation of periods of ion and neutral waves in a solar magnetic arcade.

2021 ◽  
Author(s):  
Błażej Kuźma ◽  
Kris Murawski ◽  
Zdzisław Musielak ◽  
Stefaan Poedts ◽  
Dariusz Wójcik
Keyword(s):  
Magnetic Field ◽  
Solar Atmosphere ◽  
Gravity Waves ◽  
Solar Photosphere ◽  
Acoustic Gravity Waves ◽  
Partially Ionized ◽  
The Impact ◽  
Two Fluid ◽  
Lower Solar Atmosphere ◽  
Magnetic Arcade

<p>We present a new insight into the propagation of ion magnetoacoustic and neutral acoustic waves in a magnetic arcade in the lower solar atmosphere. By means of numerical simulations, we aim to: (a) study two-fluid waves propagating in a magnetic arcade embedded in the partially-ionized, lower solar atmosphere; and (b) investigate the impact of the background magneticfield configuration on the observed wave-periods. We consider a 2D approximation of the gravitationally stratified and partially-ionized lower solar atmosphere consisting of ion + electron and neutral fluids that are coupled by ion-neutral collisions. In this model, the convection below the photosphere is responsible for the excitation of ion magnetoacoustic-gravity and neutral acoustic-gravity waves. We find that in the solar photosphere, where ions and neutrals are strongly coupled by collisions, magnetoacoustic-gravity and acoustic-gravity waves have periods ranging from250s to350s. In the chromosphere, where the collisional coupling is weak, the wave characteristics strongly depend on the magnetic field configuration. Above the foot-points of the considered arcade, the plasma is dominated by vertical magnetic field along which ion slow magnetoacoustic-gravity waves are guided. These waves exhibit a broad range of periods with the most prominent periods of 180 s, 220 s, and 300 s. Above the main loop of the solar arcade, where mostly horizontal magnetic field lines guide ion magnetoacoustic waves, the main spectral power reduces to the period of about 180 s and longer wave-periods do not exist. The obtained results demonstrate unprecedented, never reported before level of agreement with the recently reported observational data of Wisniewska et al. (2016) and Kayshap et al. (2018). We demonstrate that the two-fluid approach is indeed crucial for a description of wave-related processes in the lower solar atmosphere, with energy transport and dissipation being of the highest interest among them.</p>

Parametric generation of magnetoacoustic-gravity waves in the solar atmosphere

2003 ◽  
Vol 29 (2) ◽  
pp. 116-125 ◽  
Author(s):  
M. Yu. Petukhov ◽  
Yu. V. Petukhov
Keyword(s):  
Solar Atmosphere ◽  
Gravity Waves ◽  
Parametric Generation

Acoustic-Gravity Waves in Whirling Polar Thermosphere

2015 ◽  
Vol 47 (9) ◽  
pp. 10-22 ◽  
Author(s):  
Yuriy P. Ladikov-Roev ◽  
Oleg K. Cheremnykh ◽  
Alla K. Fedorenko ◽  
Vladimir E. Nabivach
Keyword(s):  
Gravity Waves ◽  
Acoustic Gravity Waves
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