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Chemical depletion in the Large Magellanic Cloud: RV Tauri stars and the photospheric feedback from their dusty discs
C. Gielen, H. Van Winckel, M. Reyniers +11
Aims: By studying the photospheric abundances of 4 RV Tauri stars in the LMC, we test whether the depletion pattern of refractory elements, seen in similar Galactic sources, is als…
HD172189: another step in furnishing one of the best laboratories known for asteroseismic studies
O. L. Creevey, K. Uytterhoeven, S. Martín-Ruiz +25
HD172189 is a spectroscopic eclipsing binary system with a rapidly-rotating pulsating delta Scuti component. It is also a member of the open cluster IC4756. These combined characte…
Analysis of the infrared spectra of the peculiar post-AGB stars EPLyr and HD52961
C. Gielen, H. Van Winckel, M. Matsuura +4
Aim: We aim to study in detail the peculiar mineralogy and structure of the circumstellar environment of two binary post-AGB stars, EPLyr and HD52961. Both stars were selected from…
Post-AGB stars with hot circumstellar dust: binarity of the low-amplitude pulsators
Hans Van Winckel, Tom Lloyd Evans, Maryline Briquet +28
While the first binary post-AGB stars were serendipitously discovered, the distinct characteristics of their Spectral Energy Distribution (SED) allowed us to launch a more systemat…
Long-term photometric monitoring with the Mercator telescope. Frequencies and multicolour amplitudes of Doradus stars
J. Cuypers, C. Aerts, P. De Cat +21
Gamma Doradus stars are excellent targets for asteroseismology since the gravity modes present in these stars probe the deep stellar interiors. Mode identification will improve the…