OGLE Mira variable stars with WISE & Spitzer data

The spatial distribution of the Mira stars is analyzed with a model containing three barred components that include the X-shaped boxy component in the Galactic center (GC) and an axisymmetric disk. We take into account the distance uncertainties by implementing the Bayesian hierarchical inference method.

The distance to the GC is R0=7.66+/-0.01(stat.)+/-0.39(sys.)kpc, while the inclination of the major axis of the bulge to the Sun-GC line of sight is {theta}=20.2{deg}+/-0.6{deg}(stat.)+/-0.7{deg}(sys.). We present, for the first time, a detailed three-dimensional map of the Milky Way composed of young and intermediate-age stellar populations. Our analysis provides independent evidence for both the X-shaped bulge component and the flaring disk (being plausibly warped).