Galactic C and S Stars as Guidelines for Magellanic Cloud AGB Stars

TL;DR

This paper investigates the evolutionary properties of AGB stars in the Magellanic Clouds by analyzing Galactic AGB stars and extending the study to different metallicities using infrared observations, aiming to improve understanding of their physical parameters.

Contribution

It introduces a method to constrain AGB star parameters by studying Galactic stars and applying findings to Magellanic Cloud stars with varying metallicities.

Findings

AGB stars in the Magellanic Clouds serve as key benchmarks due to known distances.

Metallicity differences influence AGB star evolution and observable properties.

Infrared observations help in constraining physical parameters of AGB stars.

Abstract

The study of the evolutionary properties of Asymptotic Giant Branch stars still presents unresolved topics. Progress in the theoretical understanding of their evolution is hampered by the difficulty to empirically explain key physical parameters like their luminosity, mass loss rate and chemical abundances. We are performing an analysis of Galactic AGB stars trying to find constraints for these parameters. Our aim is of extending this analysis to the AGB stars of the Magellanic Clouds and of the Dwarf Spheroidal Galaxies using also mid-infrared observations from the Antarctic telescope IRAIT. AGB sources from the Magellanic Clouds will be fundamental in our understanding of the AGB evolution because they are all at a well defined distance (differently from the Galactic AGBs). Moreover, these sources present different values of metallicity: this fact should permit us of examining in a better way their evolutionary properties comparing their behaviour with the one from Galactic sources.