On the behaviour of some visible and infrared atomic hydrogen lines in facular models

Abstract

The behavior of line profiles in the wings of the Balmer, Paschen, and Brackett lines (alpha to delta) has been theoretically investigated in five facular models at disk center. These profiles have been compared amongst the chosen facular models, and also compared with the photospheric observations. It is found that these profiles can distinguish amongst different facular models. It is suggested that low-noise high resolution spectra of these lines can help in improving the existing facular models