Fig. 11
Velocity-distance diagram along the line of sight of Mercer 30, showing the Galactic rotation curve from Brand & Blitz (1993) and its crossing points with the Hou & Han (2014) fit for the Sagittarius-Carina spiral arm. The error bars of Mercer 30 corresponds to the standard deviations of the radial velocity and the spectrophotometric distance.
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