M. Giard, J.P. Bernard, A. Klotz and I. Ristorcelli (eds)
EAS Publications Series, 4 (2002) 157
Stellar sources in the ISOGAL outer bulge fields (7 and 15 μm ISOCAM observations)
Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India
2 Institut d'Astrophysique de Paris, CNRS, 98bis Bd. Arago, 75014 Paris, France
3 DASGAL, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
We report the study of ISOGAL fields in the outer galactic bulge. We have combined 7 and 15 μm ISOCAM observations with DENIS IJKs 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 - Ks- colors. These sources are detected as AGB stars with large mass-loss rates.
© EAS, EDP Sciences, 2002