The giant branch of Omega Centauri. III - C, N, O and heavy-element abundances for 15 red giants

Abstract

view Abstract Citations (76) References (77) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Giant Branch of Omega Centauri. III. C, N, O and Heavy-Element Abundances for 15 Red Giants Paltoglou, G. ; Norris, John E. Abstract Observations of 15 red giants in the Galactic globular cluster Omega Cen are reported. Photometry in the V band and at 1.05 microns and 421.5 nm was obtained using the 0.6-m and 2.3-m telescopes at Siding Spring Mountain; spectra were obtained at 421-433, 611-627, and 626-642 nm using the RGO spectrograph in long-slit mode on the AAT; the results are combined with published data in extensive tables and graphs and characterized in detail. Findings discussed include Fe abundances ranging over 0.6 dex, evidence for surface mixing of CN-cycle and ON-cycle material, a positive correlation between Na/Fe and N/Fe abundance ratios, Si and Ca overabundant relative to O and Fe, and a general overabundance of s-process elements. Publication: The Astrophysical Journal Pub Date: January 1989 DOI: 10.1086/167005 Bibcode: 1989ApJ...336..185P Keywords: Globular Clusters; Heavy Elements; Milky Way Galaxy; Red Giant Stars; Stellar Spectra; Abundance; High Resolution; Peculiar Stars; Variable Stars; Astrophysics; CLUSTERS: GLOBULAR; NUCLEOSYNTHESIS; STARS: ABUNDANCES; STARS: LATE-TYPE full text sources ADS | data products SIMBAD (20) Related Materials (5) Part 1: 1976ApJ...208..369B Part 2: 1976ApJ...210..618B Part 3: 1977ApJ...211L..91N Part 5: 1995ApJ...447..680N Part 6: 1996ApJ...462..241N