Spatial stratification of acoustic oscillations in the solar photosphere

• Main Author: Stodilka, M.I.
• Format: Article
• Language: English
• Published: Головна астрономічна обсерваторія НАН України 2005
• Series: Кинематика и физика небесных тел
• Subjects: MS2: Physics of Solar Atmosphere
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/79617

Space-time variations of solar atmosphere parameters are derived by solving non-equilibrium radiation transfer problem. Acoustic oscillations were extracted using k − ω filtration of variations. In the lower photosphere there are evanescent remnants of underphotosphere oscillations; in the middle and high photosphere there are discrete sources of oscillations, which are excited by granule decay and formation of a new intergranule. The photosphere is penetrated by narrow “channels”, by which energy of fluctuations tunnels with minimal losses into the higher atmosphere layers; such “channels” arise mostly between ascending and descending flows. Particularities of the wave propagation in the solar atmosphere are determined by relationship between wavelength and the effective size of inhomogeneities.