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Paper: Post-AGB Stars in the Magellanic Clouds: Preliminary Results
Volume: 451, 9th Pacific Rim Conference on Stellar Astrophysics
Page: 187
Authors: Kamath, D.; Wood, P. R.; van Winckel, H.; van Aarle, E.
Abstract: The evolution and mass-loss of red giants is poorly understood. It is difficult to empirically estimate the mass-loss rate and the chemical abundance changes, as a function of initial mass and metallicity. Post-AGB stars are key objects in the study of the dramatic chemical and morphological changes of stars along the AGB ascent and subsequent evolution towards the Planetary Nebula phase. Thus studying these objects would help in understanding the different physical processes and the chemical evolution that occur during these evolutionary phases. Using the AAOmega multi-fibre spectrograph on the AAT, we carried out an extensive low-resolution spectral survey of several thousand post-AGB candidates, in the Large Magellanic Cloud and the Small Magellanic Cloud. The candidates were selected from the mid-IR Spitzer Space Telescope surveys: SAGE and SAGE-SMC. In this paper we present preliminary results from our survey, delineating the regions of the HR diagram where post-AGB stars are found and where Hα-emission occurs.
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