Open Access

Fig. 17

image

Point source fraction for the MIR interferometric observations of Burtscher et al. (2013). Only objects around 6 rin should be compared to Fig. 18. Objects with detected extended dust emission are marked with a star. This emission is mostly in polar direction, i.e., the direction of the narrow line region, and was detected on 10 pc-scale (López-Gonzaga et al. 2016 and references therein) and on 100 pc-scale (Asmus et al. 2016), but not for the same objects. We note that the detectability of polar dust emission depends on a number of observational parameters and nondetections do not mean that these AGNs are intrinsically different.

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