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Red Giants in ISOGAL: Tracers of the Evolution of the Galaxy

Jacco Th. van Loon
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Abstract

The DENIS/ISOGAL near/mid-IR survey of the Milky Way for the first time probes stellar populations in the innermost obscured regions of our galaxy. Ages, metallicities and extinction-corrected luminosities are derived for these stars individually by isochrone fitting to the preliminary IR photometry. A few hundred AGB stars with thick circumstellar dust envelopes are identified. An old metal-rich population dominates in the inner galactic Bulge, but there are indications for the presence of a younger population. The inner Bulge has a tri-axial shape, as traced by depth effects on the observed luminosity distributions.

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Jacco Th. van Loon. 2000-09-29. Red Giants in ISOGAL: Tracers of the Evolution of the Galaxy. https://arxiv.org/abs/astro-ph/0009471

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