Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998astl...24...52s&link_type=abstract
Astronomy Letters, Volume 24, Issue 1, January 1998, pp.52-55; Pis'ma v Astronomicheskii Zhurnal, Vol. 24, p. 58
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The propagation of atmospheric waves near the transition region in the solar atmosphere is studied. The dispersion relation for surface waves propagating at the temperature discontinuity in a two-layer model atmosphere is derived and analyzed. Exact solutions are found for this relation. They include various modes that propagate along the boundary. One type of wave has a dispersion relation of the same form as that of deep water waves. These waves can propagate if their frequency exceeds omega_g, the Brunt-Vaisala frequency for the lower layer. The frequencies of other surface waves are equal to omega_g frequencies of each of the two layers. It is also shown that a squeezed mode can propagate near the boundary. This mode is characterized by the absence of horizontal velocity and pressure perturbations. The results are used to interpret observational data for the solar atmosphere.
Bespalov Peter A.
Savina O. I.
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