A model atmosphere investigation of the effects of irradiation on the secondary star in a dwarf nova

Abstract

We compute some exploratory model atomospheres and synthetic spectra for red dwarfs which incorporate the pheomena of irradiation. these models are suitable for sutdies of the secondary stars of the shorter period dwarf noae. out models show that the incident flux produces marked changes i the temperature stratifiedcaton and emitted spectra ofthe irradiated star. we investigate the effects of angule of incidentce and, in an approximate manner, whiose of horizontal energy transfer. the latter factor has a praticularly strong effect on our results. our results have imporant implications for the interpretation of radial velocity curves of dwarf novae.