On the Solar Limb Darkening in the Wings of Some Atomic Hydrogen Lines

Abstract

The centre-to-limb behaviour of the first four lines of the Balmer, Paschen, and Brackett series of atomic hydrogen at selected distances from the line centre, i.e. at delta lamda = 5, 10, 20 and 30 A has been theoretically investigated in three photospheric modles. The results have been compared with observations of David (1961) for the Balmer lines, the corresponding observations for Paschen and Brackett lines not being available in published sources. After a detailed comparison of the computed results with the observations, it is concluded that limb-darkening data in the wings of hydrogen series lines can distinguish amongst the various photospheric models