Serendipitous discovery of warm absorbers in the Seyfert 2 galaxy IRAS 18325-5926 ⁄

Warm absorption is a common phenomenon in Seyfert Is and quasars, but is rare in Seyfert 2s. 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 similar to 400 km s(-1) was found, which is contributed by two warm absorbers with FWHM of 570 km s(-1) and 1360 km s(-1), respectively. The two absorbers were adjacent, and moving transversely across our line of sight. We constrained the distance between the center and the absorbers to be a small value, suggesting that the absorbers may originate from the highly ionized accretion disk wind ejected five years ago. The perspective of this type 2 Seyfert provides the best situation in which 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 a very high velocity similar to 6000 km s(-1).