Colour-magnitude Diagrams from Microlensing Projects and Galactic Structure

The Colour-Magnitude Diagrams (CMDs) from the microlensing projects provide valuable information, to improve our understanding of galactic structure. A description is given of the extinction along the line of sight. The MACHO and OGLE microlensing candidates ([1],[19]) are used to tune up the population model and to determine the contribution from various stellar populations in the CMD. About 5%, 25%, 40% and 30% of the stars are found to be located in respectively the halo, bulge, bar and disc of our Galaxy. The contribution from the disc is probably lower, if the disc density drops considerably between 3 – 4 kpc from the galactic centre.