Three aspects of red giant studies in the Magellanic Clouds

Details Three aspects of red giant studies in the Magellanic Clouds Three aspects of red giant studies in the Magellanic Clouds

2002-07-29

arxiv.org/abs/astro-ph/0207619v1

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures, invited talk, to be published in: Mass-Losing Pulsating Stars and their Circumstellar Matter, Y. Nakada &

Scientific paper

There are three important aspects concerning the study of the red giant and in particular of the asymptotic giant branch (AGB) stars in the Magellanic Clouds. These are: the surface distribution, the luminosity function and the variability. The spatial distribution of AGB stars is an efficient tool to study the structure of the galaxies and their metalicity by analysing the ratio between carbon- and oxygen-rich AGB stars. The shape of the luminosity function carries informations about the star formation rate in the Clouds and it can be mathematically related to their history. Most AGB stars vary their magnitude in a few to several hundred years time; the one epoch DENIS magnitudes for both Large and Small Magellanic Cloud AGB stars outline the same relations as a function of period.

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