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Fig. 4.


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Stacked radial intensity profiles. Panel a: profile stacking and panel b: image stacking. Data points show the mean intensity in adjacent annuli, with the error bars showing the standard deviation of the mean. Blue data points are for purely observational data, and red data points are for the same data with an additional fake source. Dashed lines show the best-fitting Gaussians with a fixed FWHM of r. The radius is expressed as an apparent angle, θ, scaled to the apparent size of the stellar radius, θ = r/d.

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