Schematic view on the OH streamer in OH emission at 50 km s^-1 in green contours with lowest level at ~90 mJy beam^-1 (~3.5σ) and steps of 1σ from Karlsson et al. (2015). Black contours show the 100 GHz continuum emission as in Fig. 2, red contours indicate the CS(5–4) emission as in Fig. 5, and the blue cross indicates Sgr A*. The shape of the streamer head resembles the distribution of the CS clumps.