Disc Winds Matter

The thesis explores the application of a Monte Carlo radiative transfer code to accretion disc winds across diverse systems, revealing significant findings. It demonstrates that disc winds in white dwarf binary systems not only create ultraviolet absorption lines but also generate optical emission lines and a recombination continuum. Additionally, a model for quasar disc winds is proposed, explaining both absorption and emission features, which supports a unification scenario. Furthermore, a theoretical analysis of emission line equivalent width distribution presents challenges to existing unification theories.