Behaviour of some neutral molecular absorption lines in facula models

Abstract

The equivalent widths of some selected absorption lines of C2, Ch, MgH, NH, OH and SH molecules in five facula and two photospheric models have been calculated under the assumption of LTE. The calculations reveal that the lines belonging to C2 can be used for refining spatially limited models. Molecules MgH and SH are good candidates for homogeneous facula models, but the lines would be extremely weak or absent in spatially limited models. Molecules CH, NH and OH seem to be good candidates both for the homogeneous and the spatially limited facular models.