Stellar Populations in the Galactic Bulge
- Author(s)
- Mathias Schultheis, Bernhard Aringer, Ariane Lançon
- Abstract
We present near-IR spectra (HK-band) of a sample of 107 sources detected during the ISOGAL survey [8] in the most inner regions of our Galaxy which is completely hampered by interstellar extinction (AV > 25 mag). We show in this work that combining near and mid-IR data (DENIS, 2MASS, ISOGAL), infrared spectroscopy and the interstellar extinction map [13] allows to study the properties of the different stellar populations in the Inner Galaxy. Making use of the ISOGAL data, we discuss mass-loss rates of AGB stars and determine metallicities using the atomic lines of NaI and CaI at ~ 2.2 ?m. Using the lastest hydrostatic MARCS models, we do a first quantitative comparison between models and observations.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Observatoire de Besançon, CNRS, Université de Strasbourg
- Pages
- 435-438
- No. of pages
- 4
- DOI
- https://doi.org/10.1007/10995082_70
- Publication date
- 2005
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/7e8def60-91eb-47a1-a73d-b4e07e0f4f02