Characteristic parameters of the Moffat profile model with β = 2.5 fitting the 44 narrowband filter images of selected point-like sources in the MUSE Field of HD90177 labeled HD90177a (see Fig. B.2, top left). The top panels show the wavelength-dependent variations of the centroid (x0,y0) with respect to the average star peak location (indicated by the dashed horizontal line). The bottom panels present the variation in the width parameter σ_i (i=1,2) with wavelength. Measurements along axis i=1 (horizontal) and i=2 (vertical) are represented by filled black circles and blue squares, respectively. The star numbers correspond to the star labels in Fig. B.2 (top left).