Table 3: Predicted colours for the Galactic bulge assuming two different IMFs, compared to observational values of local bulges from various sources (a: Balcells & Peletier 1994; b: Galaz et al. 2006).

Photometric properties of the Galactic Bulge

    (B-R) (U-R) (R-K)
Observed (a) 1.27 - 1.6 1.24 - 2.16 2.39 - 2.97
  (b) 0.5 - 2.18    
Predicted (x=1.35) 1.64 - 1.71 1.94 - 2.09 2.22 - 2.38
  (x=0.95) 1.75 - 1.83 2.20 - 2.40 2.49 - 2.68

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