Relativistic radiative transfer and relativistic plane-parallel flows

Abstract

Abstract Relativistic radiative transfer and relativistic plane-parallel flows accelerated from their base like accretion disk winds are numerically examined under the special relativistic treatment. We first solve the relativistic transfer equation iteratively, using a given velocity field, and obtain specific intensities as well as moment quantities. Using the obtained flux, we then solve the hydrodynamical equation, and obtain the new velocity field and the mass-loss rate as an eigen value. We repeat these double-iteration processes until both the intensity and velocity profiles converge. Under this double iteration, we solve the relativistic radiative transfer equation and relativistic flows in the vertical direction, simultaneously. The flows are gradually accelerated, as the optical depth decreases towards the surface. The mass-loss rate $\dot{J}$ is roughly expressed in terms of the optical depth τb and terminal speed βs of the flow as $\dot{J} \sim 10 \tau _{\rm b} \beta _{\rm s}^{-3/4}$.