Kinematics of the local disk from the RAVE survey and the Gaia first data release

Understand

We attempt to constrain the kinematics of the thin and thick disks using the Besancon population synthesis model together with RAVE DR4 and Gaia first data release (TGAS).

• The RAVE fields were simulated by applying a detailed target selection function and the kinematics was computed using velocity ellipsoids depending on age in order to study the secular evolution.
• We accounted for the asymmetric drift computed from fitting a Stackel potential to orbits.
• Model parameters such as velocity dispersions, mean motions, and velocity gradients were adjusted using an ABC-MCMC method.