Serendipitous Discovery of Warm Absorbers in the Seyfert 2 Galaxy IRAS
  18325-5926
  Warm absorption is a common phenomenon in Seyfert 1s and quasars, but rare in
Seyfert 2s. In this paper, we report the detection of warm absorbers with high
energy resolution in the Seyfert 2 galaxy IRAS 18325-5926 for the first time
with Chandra HETGS spectra. An intrinsic absorbing line system with an outflow
velocity ~400 km/s was found, which is contributed by two warm absorbers with
FWHM of 570 km/s and 1360 km/s, respectively. The two absorbers were adjacent,
and doing a transverse motion across our line of sight. We constrained the
distance of the absorbers to a small value, suggesting that the absorbers may
originate from the highly ionized accretion disk wind. The perspective of this
type 2 Seyfert provides the best situation to investigate the vertical part of
the funnel-like outflows. Another weak absorbing line system with zero redshift
was also detected, which could be due to Galactic absorption with very high
temperature, or an intrinsic outflow with very high velocity ~6000 km/s.
