Proceedings of the International Astronomical Union

Table of Contents - 2008 - Volume 4, Symposium S256 (The Magellanic System: Stars, Gas, and Galaxies)  

Contributed Papers

Thermally-pulsing asymptotic giant branch stars in the Magellanic Clouds

Paola Marigoa1, Léo Girardia2, Alessandro Bressana1, Martin A. T. Groenewegena3, Bernhard Aringera4, Laura Silvaa5 and Gian Luigi Granatoa5

a1 Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I-35122 Padova, Italy — email: paola.marigo@unipd.it

a2 Osservatorio Astronomico di Padova – INAF, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy

a3 Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussels, Belgium

a4 Department of Astronomy, University of Vienna, Tuerkenschanzstr. 17, A1180 Wien, Austria

a5 Osservatorio Astronomico di Trieste – INAF, Via Tiepolo 11, I-34131 Trieste, Italy

Abstract

We present the latest results of a theoretical project aimed at investigating the properties of thermally-pulsing asymptotic giant branch (TP-AGB) stars in different host systems. For this purpose, we have recently calculated calibrated synthetic TP-AGB tracks — covering a wide range of metallicities (0.0001 ≤ Z ≤ 0.03) up to the complete ejection of the envelope by stellar winds (Marigo & Girardi 2007) — and used them to generate new sets of stellar isochrones (Marigo et al. 2008). The latter are converted to about 25 different photometric systems, including the mid-infrared filters of Spitzer and AKARI as the effect of circumstellar dust from AGB stars is taken into account. First comparisons with AGB data in the MC field and stellar clusters are discussed.

Keywords

  • stars: AGB and post-AGB;
  • stars: carbon;
  • stars: evolution;
  • globular clusters: individual (47 Tuc);
  • Magellanic Clouds;
  • infrared: stars