A Semianalytical Line Transfer Model. III. Galactic Inflows

Abstract We present calculations of ultraviolet spectra resulting from the scattering photons by gas infalling onto an isotropically emitting source radiation. The model is based on adaptation semianalytical line transfer (SALT) code Scarlata & Panagia, and designed to interpret inverse P Cygni profiles observed in partially ionized galactic inflows. In addition presenting model, we explore parameter space inflowing SALT recreate various physically motivated scenarios including spherical inflows, inflows with covering fractions less than unity, fountains (i.e., systems both outflowing component). show spectral features that could be misinterpreted as interstellar medium low resolution spectroscopy ( σ ≈ 120 km s −1 ), suggesting total number undercounted. Our models suggest observations at R = 6000 or 50 ) can obtained 8 m class telescopes will able resolve characteristic necessary identify