Spectroscopic studies of the stellar population in Baade's window.

An extensive IR photometric and spectroscopic study of the stellar population in Baade's Window has been made, obtaining the Cumulative Clouds Function (CCF) in the range K = 5.5-13.5. A theoretical exponential disk model for the plane of the Galaxy was used to obtain the CCF for the bulge stellar population alone. This CCF is much steeper than that of the disk and is typical of CCFs exhibited by the old low mass stars in globular clusters. The CCF data are used to derive a disk/bulge ratio as a function of apparent K magnitude. The disk population is dominant at the bright end of the CCF. When K = +9.5, both components, disk and bulge, are equally important, and the bulge population is clearly dominant at the faint end of the CCF.