Abstract
We report the study of ISOGAL fields in the outer galactic bulge. We have combined 7 and 15 μ m ISOCAM observations with DENIS IJK s near-infrared data to determine the nature of the sources and the interstellar extinction. Most of the ISOGAL sources show evolution of mass-loss rates in the range 10 -8 to 10 -6 M ⊙ /year. Most of the detected sources are red giants above the RGB tip; a few of them show an excess in and J - K s -[15] colors. These sources are detected as AGB stars with large mass-loss rates.
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