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Article
A spectroscopic quadruple as a possible progenitor of sub-Chandrasekhar type Ia supernovae
Binaries have received much attention as possible progenitors of type Ia supernova explosions1, but long-term gravitational effects2,3 in tight triple or quadruple systems could also play a key role in producing ...
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Article
Carbon-enhanced metal-poor stars enriched in s-process and r-process elements
We present an on-going project consisting of analysis of a sample of twenty-five metal-poor stars, most of them carbon-enriched and thus tagged carbon-enhanced metal-poor (CEMP) stars, observed with the high-r...
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Chapter
Velocity Fields in Stellar Atmospheres Probed by Tomography
A tomographic method to probe velocity fields within stellar atmospheres is described. It relies on the design of spectral masks collecting lines forming at given, pre-specified ranges of optical depths. Diffe...
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Chapter
AGB Stars in Binaries and Their Progeny
Although binarity and AGB evolution are in principle disconnected concepts (a star need not be member of a binary system to evolve along the AGB), a rich world flourishes at their contact. The interest in disc...
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Chapter and Conference Paper
The Link between Barium Stars and Optically Bright Post-AGB Binaries
Systematic radial velocity monitoring programs revealed that all optically bright, high-latitude post-AGB stars that show a near-IR excess in their energy distribution are binaries (see the contribution of R. ...