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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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