Title: How to reconcile the C and s-process abundances in the metal-poor star V453 Oph ?
Authors: Deroo, Pieter ×
Goriely, S
Siess, L
Reyniers, Maarten
Van Winckel, Hans #
Issue Date: Jul-2005
Publisher: North Holland Pub. Co.
Series Title: Nuclear Physics A vol:758 pages:288C-291C
Abstract: In this poster we present a detailed chemical analysis of the RV Tauri star of low intrinsic metallicity, V453 Oph ([Fe/H]=-2.2), which shows a mild but clear s-process surface overabundance. This result is strengthened by a relative analysis to the RV Tauri star DS Aqr of similar metal deficiency ([Fe/H]=-1.6), but without such s-process enrichment. A remarkable result is that the s-process enrichment of V453 Oph is not accompanied by a measurable C enhancement. To explain the surface abundances observed in V453 Oph, two nucleosynthesis models are considered. The first model assumes the partial mixing of protons during the radiative interpulse phase while the second scenario is based on the possible production of s-process elements within the flash-driven convective pulse only. Both models can give a satisfactory explanation for the s-process enrichment of V453 Oph, but not the simultaneous low C-abundance observed.
ISSN: 0375-9474
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science