Reflection effect in close binaries. V. effects of reflection on spectral line formation

Abstract

The effects of reflection on the formation of spectral lines is investigated. The authors have assumed a purely scattering atmosphere and studied how the equivalent widths change due to irradiation from the secondary. Generally, the flux in the lines is increased at all frequency points, the cores of the lines receiving more flux than the wings. Moreover, the proximity of the secondary component changes the equivalent widths considerably. The further away the secondary is from the primary the higher are the equivalent widths.