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Fig. 1.


U − V distribution of 581 190 stars inside a region defined in R ± 0.2 kpc and ϕ ± 1.5° (see Sect. 3). The color scale is proportional to the number of stars, as indicated in the bar at the top. Stars in the HR 1614 moving group from Feltzing & Holmberg (2000) are shown as blue crosses and their best-selected candidates as black open circles. We identify stars within the red and black ellipses as members of the Hercules stream and the HR 1614 moving group, respectively (see discussion in Sect. 3). Dashed lines and numbers show the same boxes as in Feltzing & Holmberg (2000).

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