Spatial variations of the convective motions in the real solar photosphere
Convective motions in the solar photosphere are investigated by using observational data of neutral iron line λ ≈ 639.3 nm obtained with the 70-cm German Vacuum Tower Telescope (Canary Islands, Spain) around the center of the solar disc in the non-perturbed region. The altitude changes of power spectra of the vertical velocity and temperature variations in the photospheric convection are analyzed. Spatial distributions of variations of the vertical velocity and temperature are investigated at different spatial scales: granular (0.5 ÷ 5.0 Мм), mesogranular (5 ÷ 12 Мм) and supergranular (20 ÷ 30 Мм) ones. In the photospheric layers the significant differences between the convective cells at granular and mesogranular scales are not identified – at these scales variations of the vertical velocity and temperature decrease with height. The vertical velocity field at supergranular scales is well conserved at penetration into the upper layers of the photosphere.
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