Chemo-kinematic characterisation of the Red Clump stars of the Galactic bar

Abstract

Thanks to recent surveys, we now have larger homogeneous data sets containing kinematics and metallicities of stars outside the solar neighbourhood. From a cross-match between Gaia DR2 and APOGEE DR16 data, we can study the complex chemical and dynamical structure of the galactic disk, which is perturbed by the existence of a galactic bar. We run an orbital integrator to classify the 3D quasiperiodic orbits into the different resonant families. Since the cross-match between GAIA DR2 and APOGEE DR16 data gives us also the metallicities, we then investigate the effect of bar resonances on the metallicity distribution in the Milky Way