Normalized power spectra of the three Stokes maps I, Q, and U, toward all the cores of the sample as a function of spatial scale, in au, ranging from the beam size up the maximum recoverable scale. Solid Lines: Stokes I. Dashed and dot-dashed lines: Stokes Q and U, respectively.Each color corresponds to an angular resolution. Red is the original angular resolution. Blue is four times lower resolution (in terms of beam area).