Physical Parameters of Dark Mottles in Hα

Physics

Scientific paper

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Sun: Chromosphere, Fine Structure, Mottles, Techniques: Image Processing

Scientific paper

In April 2002, Hα observations of the solar chromosphere with high spatial and high spectral resolution were obtained with the Gottingen Fabry-Perot Spectrometer mounted in Vacuum Tower Telescope at the Observatory del Teide/Tenerife. Intensity and velocity maps for different wavelengths widths were derived over the two-dimensional field of view by applying Lambdameter method. Some physical parameters; like the optical thickness, Doppler width, velocity and source function of dark mottles were determined using Beckers' cloud model (Beckers, 1964). In this work, the obtained results will be discussed.

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