Structure of the low solar chromosphere derived from solar eclipse observations in D1,2 NaI

Physics – Space Physics

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Scientific paper

To study the structure of the lower and middle chromosphere and to determine non-thermal motion in active and quiet regions of the chromosphere 350 spectra of the west limb of the Sun with D1,2 NaI lines obtained during the eclipse of July 31, 1981 were digitalized with a special automatic photometer. The charts of integral intensity of the D1,2 lines were obtained. The values of integral brightness for D1,2 NaI lines were obtain for all digitized spectra. On the received charts of the integral intensities ratio D1 / D2 the non-uniform structure of the chromosphere is found out. The sizes of these heterogeneities are close to the sizes of supergranulation.

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