A wide angle view of the Sagittarius dwarf spheroidal galaxy -- II. A
  CEMP-r/s star in the Sagittarius dwarf Spheroidal Galaxy
  We report on the discovery and chemical abundance analysis of the first
CEMP-r/s star detected in the Sagittarius dwarf Spheroidal Galaxy, by means of
UVES high resolution spectra. The star, found in the outskirts of Sgr dSph,
along the main body major axis, is a moderately metal poor giant
(T$_{eff}$=4753 K, log g=1.75, [Fe/H]=-1.55), with [C/Fe]=1.13 placing it in
the so-called "high-carbon band", and strong s-process and r-process enrichment
([Ba/Fe]=1.4, [Eu/Fe]=1.01). Abundances of 29 elements from C to Dy were
obtained. The chemical pattern appears to be best fitted by a scenario where an
r-process pollution event pre-enriched the material out of which the star was
born as secondary in a binary system whose primary evolved through the AGB
phase, providing C and s-process enrichment.
