MDF and αDF from an N-body simulation. Left panel: raw MDF, right: αDF. The blue line is the DFs of all star particles in the N-body model, the orange line shows the DFs of all particles along each APOGEE pointing, and the green line shows the DFs of the star particles along each pointing, with the same DDF as APOGEE. We show the MDF and αDF for stars with a galactocentric radius of 4−6 kpc.