Summary
ABSTRACT Warm absorbers are present in many active galactic nuclei (AGN), seen as mildly ionized gas outflowing with velocities of a few hundred to a few thousand kilometres per second. These slow velocities imply a large launch radius, pointing to the broad-line region and/or torus as the origin of this material. Thermal driving was originally suggested as a plausible mechanism for launching this material but recent work has focused instead on magnetic winds, unifying these slow, mildly ionized winds with the more highly ionized ultrafast outflows. Here we use the recently developed quantitative models for thermal winds in black hole binary systems to predict the column density, velocity, and ionization state from AGN. Thermal winds are sensitive to the spectral energy distribution (SED),
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