Sky map of residual significance. All the stars in the sample from which we performed our tomographic inversion are represented. Transparent gray dots (gray crosses) show stars that do (do not) fall in an HEALPix pixel for which we have tomography data. Blue and green circles show the stars for which the median of their distribution of Mahalanobis distances exceed a threshold values corresponding to the p-value indicated in the legend (see text). The lower the p-value, the more significant the residuals.