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Stellar sources in the ISOGAL outer bulge fields (7 and 15 μm ISOCAM observations)

Published online by Cambridge University Press:  25 September 2002

D. K. Ojha
Affiliation:
Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India
A. Omont
Affiliation:
Institut d'Astrophysique de Paris, CNRS, 98bis Bd. Arago, 75014 Paris, France
F. Schuller
Affiliation:
Institut d'Astrophysique de Paris, CNRS, 98bis Bd. Arago, 75014 Paris, France
G. Simon
Affiliation:
DASGAL, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
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Abstract

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-[15] colors. These sources are detected as AGB stars with large mass-loss rates.

Type
Research Article
Copyright
© EAS, EDP Sciences, 2002

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