Scl-1013644: a CEMP-s star in the Sculptor Dwarf Spheroidal Galaxy

Abstract

Recent studies of the Milky Way and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. (2005) as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe] = +0.8, [N/Fe] = -0.3 and [Ba/Fe] = +2.1 with the latter result consistent with the value found by Geisler et al. (2005). These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.

6 pages, 4 figures, 3 tables

References in corpus (12)

• Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
• Carbon-Enhanced Metal-Poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
• Stellar Velocities in the Carina, Fornax, Sculptor and Sextans dSph Galaxies: Data from the Magellan/MMFS Survey
• Segue 1: An Unevolved Fossil Galaxy from the Early Universe
• Analysis and calibration of CaII triplet spectroscopy of Red Giant Branch stars from VLT/FLAMES observations
• Multi-Element Abundance Measurements from Medium-Resolution Spectra. II. Catalog of Stars in Milky Way Dwarf Satellite Galaxies
• Binarity in Carbon-Enhanced Metal-Poor stars
• An Elemental Assay of Very, Extremely, and Ultra Metal-Poor Stars
• Carbon Stars in the Hamburg/ESO Survey: Abundances
• The Araucaria Project. The Distance to the Sculptor dwarf spheroidal galaxy from infrared photometry of RR Lyrae stars
• The first carbon-enhanced metal-poor star found in the Sculptor dwarf spheroidal
• Carbon in Red Giants in Globular Clusters and Dwarf Spheroidal Galaxies

Cited by in corpus (7)

• Abundance analysis of a CEMP-no star in the Carina dwarf spheroidal galaxy
• Evidence for multiple nucleosynthetic processes from carbon enhanced metal-poor stars in the Carina dwarf spheroidal galaxy
• An investigation of C, N and Na abundances in red giant stars of the Sculptor dwarf spheroidal galaxy
• High-resolution spectroscopic observations of the new CEMP-s star CD-50${}^{\circ }$776
• Carbon-enhanced metal-poor stars in the SDSS-APOGEE database
• Evidence of globular cluster abundance anomalies in the SMC intermediate-age cluster Kron 3
• A Main Sequence CH-star in the globular cluster M55 (NGC 6809)