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Fig. 3


Geometry of Sun and RX J0439.86809 in the Galaxy shown schematically. Panel a): view from above the Milky Way plane. Panel b): decomposition of the space velocity in the Milky Way into the components vrot, the velocity parallel to the disk in the direction of circular rotation, vaxis, the velocity component pointing (parallel to the disk) at the rotation axis of the Galaxy, and vz, the velocity perpendicular to the disk; the outward direction has a positive sign. Panel c): the geometry as seen from the Milky Way rotation axis. Velocities are given in GSR (see Sect. 4.1). The radial velocity of the star is +220 km s-1 (Werner & Rauch 2015).

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