We investigate radial metallicity gradients for a sample of dwarf stars from the RAdial Velocity Experiment ( RAVE ) Data Release 3 ( DR3 ) .
We select a total of approximately 17000 F-type and G-type dwarfs using selection of colour , \log g , and uncertainty on derived space motion , calculate for each star a probabilistic ( kinematic ) population assignment to thick or thin disc using space motion , and additionally another ( dynamical ) assignment using stellar vertical orbital eccentricity .
We additionally subsample by colour , to provide samples biased to young thin disc and to older thin disc stars .
We derive a metallicity gradient as a function of Galactocentric radial distance , i.e . d [ M / H ] / dR _ { m } = -0.051 \pm 0.005 dex kpc ^ { -1 } , for the youngest sample , F-type stars with vertical orbital eccentricities e _ { V } \leq 0.04 .
Samples biased to older thin disc stars show systematically shallower abundance gradients .