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Dust at sub-solar metallicity: the case of post-AGB stars in the Large Magellanic Cloud
Dust at sub-solar metallicity Large Magellanic Cloud
2010/11/11
Low- and intermediate-mass stars are one of the important dust sources in the interstellar medium (ISM) of galaxies. The compositions of dust ejected from these stars are likely to affect those in the...
The mass-loss rates and molecular abundances of S-type AGB stars
mass-loss rates molecular abundances of S-type AGB stars
2010/11/12
The S-type stars are believed to have a C/O-ratio close to unity (within a few percent). They are considered to represent an intermediate evolutionary stage as AGB stars evolve from oxygen-rich M-type...
AGB Stars in WLM
AGB Stars WLM
2010/11/15
We investigate the star formation history and metallicity of the Local Group irregular dwarf galaxyWLM using wide-field JHK near-infrared imaging, spanning a region of approximately 1 sq. degree, obta...
Determining the forsterite abundance of the dust around AGB stars
forsterite abundance of the dust AGB stars
2010/11/11
We present a diagnostic tool to determine the forsterite abundance of the dust ejected by AGB stars. Our method is based on a comparison between the observed strength of spectral bands of forsterite a...