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Fig. 4.

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Proper motion distribution for the comparison field (top row) and the Brick field (bottom row). Left-hand plots correspond to the perpendicular component, where the red Gaussian represents the Bulge stars and the black one corresponds to the NSD stars. Right-hand plots correspond to the parallel component, where the red Gaussian represents the Bulge stars and the yellow and black ones represent the NSD stars moving eastward and westward, respectively.

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