Hubble Space Telescope (HST) F606W image of NGC 7172 (Malkan et al. 1998). The image shows the galaxy NGC 7172 in the visible at 6030 Å. The brightness scale is non-linear such that the edges of the galaxy can be recognized. The small square shows the 4″ × 4″ FOV of our SINFONI observation. The zoom in the upper left corner of the HST image shows this region on a linear brightness scale. Note that the brightest point in the detailed image is the brightest visible point of the galaxy. The dust lane crossing the central region is clearly visible as a dark lane. Note that north of the dust lane is very faint compared to the southern part. The dust lane itself shows 1/30 of the brightness of the brightest point in the visible.
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