Evolution of the Outflows in NGC 3516
  We analyze the 2011 HST/COS spectrum of the Seyfert 1 galaxy NGC 3516, which
demonstrates clear changes in one of the intrinsic absorption troughs
(component 5), slight evidence of change in a second trough (component 6), and
the appearance of a new absorption trough (component 9). We interpret both the
changes and the appearance of the new trough as bulk motion across the line of
sight. The implied lower limit on the transverse velocity of component 5 is 360
km/s, compared to the earlier 2001 HST/STIS spectrum, while the lower limits
for components 6 and 9 are 920 km/s, based on 2009 FUSE data. Component 5 also
exhibits a shift in velocity centroid. This is only the second known case of
this behavior in a Seyfert galaxy. Due to the high quality of the HST/COS
spectrum, we identify a previously undetected trough due to an excited state of
Si II for component 1. In combination with the resonance trough of Si II and
photoionization modeling, we directly determine the distance of the component 1
outflow to be 67.2 pc.
