Fig. 6.
OmegaCAM Hα emission showing the ionised gas in the vicinity of NGC 1316. The blue contour shows the majority of the western lobe of NGC 1316 in radio continuum at a (conservative) level of 1.3 mJy beam−1 from Maccagni et al. (2020). The white contours show the 3σ H I column density of 1.4 × 1019 atoms cm−2 (over 44.1 km s−1) from this work. Known sources (i.e. galaxies and IGM H I) and multiphase (MP) gas clouds that contain Hα and H I as well as the Ant-like feature from Fomalont et al. (1989) are labelled. This image reveals long filaments of ionised gas in the IGM.
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