Observed PACS spectra (continuum normalized) of the OH transition at 119 μm of IRAS F13352+6402 (top left), IRAS F10091+4704 (top right), IRAS F20036−1547 (bottom left), and IRAS F18216+6419 (bottom right). The origin of the velocity scale corresponds to the OH 119.23 μm transition at the systemic velocity. The vertical lines mark the positions of the 16OH and 18OH doublets and the CH+(3−2) transition. Two of the systems, IRAS F20036−1547 and IRAS F13352+6402, show evidence of fast (maximum velocity ∼1000 km s−1) molecular outflowing gas, while IRAS F10091+4704 shows evidence of a molecular gas inflow. For QSO IRAS F18216+6419 we do not detect significant levels of absorption or emission in any of the OH features.
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