Context : There have been conflicting results with respect to the extent that radial migration has played in the evolution of the Galaxy .
Additionally , observations of the solar neighborhood have shown evidence of a merger in the past history of the Milky Way that drives enhanced radial migration .

Aims : We attempt to determine the relative fraction of stars that have undergone significant radial migration by studying the orbital properties of metal-rich ( [ Fe/H ] > 0.1 ) stars within 2 kpc of the Sun .
We also aim to investigate the kinematic properties , such as velocity dispersion and orbital parameters , of stellar populations near the sun as a function of [ Mg/Fe ] and [ Fe/H ] , which could show evidence of a major merger in the past history of the Milky Way .

Methods : We used a sample of more than 3,000 stars selected from the fourth internal data release of the Gaia-ESO Survey .
We used the stellar parameters from the Gaia-ESO Survey along with proper motions from PPMXL to determine distances , kinematics , and orbital properties for these stars to analyze the chemodynamic properties of stellar populations near the Sun .

Results : Analyzing the kinematics of the most metal-rich stars ( [ Fe/H ] > 0.1 ) , we find that more than half have small eccentricities ( e < 0.2 ) or are on nearly circular orbits .
Slightly more than 20 % of the metal-rich stars have perigalacticons R _ { p } > 7 kpc .
We find that the highest [ Mg/Fe ] , metal-poor populations have lower vertical and radial velocity dispersions compared to lower [ Mg/Fe ] populations of similar metallicity by \sim 10 km s ^ { -1 } .
The median eccentricity increases linearly with [ Mg/Fe ] across all metallicities , while the perigalacticon decreases with increasing [ Mg/Fe ] for all metallicities .
Finally , the most [ Mg/Fe ] -rich stars are found to have significant asymmetric drift and rotate more than 40 km s ^ { -1 } slower than stars with lower [ Mg/Fe ] ratios .

Conclusions : While our results can not constrain how far stars have migrated , we propose that migration processes are likely to have played an important role in the evolution of the Milky Way , with metal-rich stars migrating from the inner disk toward to solar neighborhood and past mergers potentially driving enhanced migration of older stellar populations in the disk .