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Mass-losing AGB stars in Galactic Bulge ISOGAL fields

Published online by Cambridge University Press:  25 May 2016

J.A.D.L. Blommaert ,
S. Ganesh ,
A. Omont ,
M. Schultheis ,
D. Ojha ,
C. Alard ,
G. Simon  and
The ISOGAL Collaboration
J.A.D.L. Blommaert
Affiliation:
ISO Data Centre, Astrophysics Division, Space Science Dept. of ESA, Villafranca, PO Box 50727, E-38080 Madrid, Spain
S. Ganesh
Affiliation:
Institut d'Astrophysique de Paris, CNRS, France
A. Omont
Affiliation:
Institut d'Astrophysique de Paris, CNRS, France
M. Schultheis
Affiliation:
Institut d'Astrophysique de Paris, CNRS, France
D. Ojha
Affiliation:
TIFR, Bombay, India
C. Alard
Affiliation:
Observatoire de Paris, DASGAL, France ISOGAL Collaboration
G. Simon
Affiliation:
Observatoire de Paris, DASGAL, France ISOGAL Collaboration

Abstract

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First results on AGB stars with the ISOGAL mid-infrared survey are presented. We show that M6 and later spectral type giants are detected at 7 and 15 μm up to the distance of the Galactic Centre. Analysis of the observed magnitudes and colours indicates that most of the detected AGB stars in the Galactic Bulge are losing mass. ISOCAM CVF spectra on a field in the Bulge confirm the mass loss and also show a large diversity in the shape of the silicate feature.

Type
Part 6. AGB Stars as a Population of Various Galaxies
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 511 - 516
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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