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Title: Depletion in post-AGB stars with a dusty disc. II
Authors: Maas, T
Van Winckel, Hans
Evans, TL #
Issue Date: Jan-2005
Publisher: E d p sciences
Series Title: Astronomy & astrophysics vol:429 issue:1 pages:297-U92
Abstract: We present a chemical abundance analysis on the basis of high signal-to-noise and high resolution spectra for 12 stars of our newly defined sample. The selection criterion for the stars of this sample was their position in the "RV Tauri" box in the [12]-[25], [25]-[60] two-colour diagram. An additional requisite was the presence of a near-IR excess. We found that the photospheres of nine stars are affected by the depletion process. Since the most likely origin of the near-IR excess is a disc, this strongly suggests that the phenomenon of depletion and the presence of a disc are linked. Among the depleted stars we find different depletion patterns. In seven stars elements with a condensation temperature below 1500 K are not or only slightly affected. Large underabundances are measured only for most elements with a condensation temperature above 1500 K.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
# (joint) last author

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