FORMATION OF QUASI-PERIODIC OSCILLATIONS IN THE SOLAR CORONA
УДК 523.9 Солнце. Физика Солнца УДК 52 Астрономия. Геодезия УДК 53 Физика УДК 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа УДК 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии УДК 523 Солнечная система УДК 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система УДК 52-1 Метод изучения УДК 52-6 Излучение и связанные с ним процессы
Аннотация и ключевые слова
Аннотация (русский):
The dispersion of acoustic waves in the rarefied high-temperature plasma of the solar corona and its role in the propagation of disturbances occurring in the corona are analyzed. We believe that the quasi-periodic oscillations (QPOs) that are recorded when observing propagating disturbances in coronal holes and loops are formed as a result of the combined effect of dispersion and damping of compressive waves. Observations and wavelet analysis show that their spectra are continuous, where the periods are distinguished by corresponding maxima. The shape of spectrum is characteristic of localized disturbances. The study is based on the simple model of non-adiabatic waves in high-temperature plasma, taking into account the properties of thermal conductivity, radiative cooling and constant heating.

Ключевые слова:
Sun: corona, helioseismology, oscillations
Список литературы

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