Fig. 2.
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2MASS colour-magnitude diagram (J − Ks, J) of the 1° ×1° region centred at ℓ = 45° ,b = 5°; 75° b = −1°; 315° ,b = 0°; and 90° ,b = 0° in panels a, b, c, and d, respectively. Red points represent the selected RC star candidates. The black dots in the density plots are used to show the last 100 points in the lowest-density region.
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