• A
  • A
  • A
  • ABC
  • ABC
  • ABC
  • А
  • А
  • А
  • А
  • А
Regular version of the site

Article

Five-Minutes Solar Atmosphere Oscillations due to the Instability of Acoustic Gravity Wave

Central European Astrophysical Bulletin. 2015. Vol. 39. P. 83-90.

Natural oscillations of the entire nonisothermal solar atmosphere are analysed. Such oscillations are probably related to the acoustic gravity wave. Analytical and numerical solutions describing acoustic gravity wave perturbations in the entire solar atmosphere are studied. Based on the model temperature profile, we find the spatio-temporal dependence for the linear acoustic gravity wave characteristics. The performed analysis using the approximate local method showed a possibility for the existence of instability of the acoustic gravity wave in the nonisothermal atmosphere. Such an instability develops at frequencies and spatial scales typical for the vertical five-minute oscillation of the solar atmosphere.