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We construct the rotation curve of the Milky Way in the extended solarneighbourhood using a sample of SEGUE (Sloan Extension for GalacticUnderstanding and Exploration) G-dwarfs. We investigate the rotation curveshape for the presence of any peculiarities just outside the solar radius ashas been reported by some authors. We approach the problem in a framework ofclassical Jeans analysis. Using the most recent data from RAVE (RAdial VelocityExperiment), we determine the solar peculiar velocity and the radialscalelengths for the three populations of different metallicities representingthe Galactic thin disc. Then with the same binning in metallicity for the SEGUEG-dwarfs, we construct the rotation curve in the range of Galactocentricdistances 7-10 kpc. We derive the circular velocity by correcting the meantangential velocity for the asymmetric drift in each distance bin. With SEGUEdata we also calculate the radial scalelength of the thick disc taking as knownthe derived peculiar motion of the Sun and the slope of the rotation curve. Therotation curve constructed through SEGUE G-dwarfs appears to be smooth in theselected radial range. The local kinematics of the thin disc rotation asdetermined in the framework of our new careful analysis does not favour thepresence of a massive overdensity ring just outside the solar radius.

The local rotation curve of the Milky Way based on SEGUE and RAVE data