Fig. A.1
Distributions of the Sérsic index (n) from GALFIT fits to AGNs and inactive control galaxies in the WFC3/F160W band. 1000 draws of a mass-matched control sample are analyzed to determine the 1σ/2σ scatter in the n distributions for inactive galaxies, shown as dark/light grey zones in the histograms. Red open histograms show the distributions for the AGNs. Left: results from fits of a single Sérsic elliptical model. Right: results from fits with two components – a Sérsic elliptical model and a central point source. The inclusion of a point source results in lower Sérsic indices for both AGNs and inactive galaxies.
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