Abstract
We present absorption line analysis of the outflow in the quasar IRAS
F04250-5718. Far-ultraviolet data from the Cosmic Origins Spectrograph onboard
the Hubble Space Telescope reveal intrinsic narrow absorption lines from high
ionization ions (e.g., C IV, N V, and O VI) as well as low ionization ions
(e.g., C II and Si III). We identify three kinematic components with central
velocities ranging from ~-50 to ~-230 km/s. Velocity dependent, non-black
saturation is evident from the line profiles of the high ionization ions. From
the non-detection of absorption from a metastable level of C II, we are able to
determine that the electron number density in the main component of the outflow
is < 30 per cubic cm. Photoionization analysis yields an ionization parameter
log U ~ -1.6 +/- 0.2, which accounts for changes in the metallicity of the
outflow and the shape of the incident spectrum. We also consider solutions with
two ionization parameters. If the ionization structure of the outflow is due to
photoionization by the active galactic nucleus, we determine that the distance
to this component from the central source is > 3 kpc. Due to the large distance
determined for the main kinematic component, we discuss the possibility that
this outflow is part of a galactic wind.