Fig. 1
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Geometry of the debris disc, showing the north, east, and radial directions on the sky and the disc PA. The vector of the space velocity of the host star with respect to the LIC, vstar_LIC, is represented by a blue arrow, which has angle ρ with respect to the radial direction. Angle θ is the angle of the sky projection of vstar_LIC with respect to the east sky direction.
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