Chemical Abundances for 855 Giants in the Globular Cluster Omega Centauri (NGC 5139)

Abstract

We present elemental abundances for 855 red giant branch (RGB) stars in the globular cluster Omega Centauri (w Cen) from spectra obtained with the Blanco 4m telescope and Hydra multifiber spectrograph. The sample includes nearly all RGB stars brighter than V=13.5, and span's w Cen's full metallicity range. The heavy alpha elements (Si, Ca, and Ti) are generally enhanced by ~+0.3 dex, and exhibit a metallicity dependent morphology that may be attributed to mass and metallicity dependent Type II supernova (SN) yields. The heavy alpha and Fe-peak abundances suggest minimal contributions from Type Ia SNe. The light elements (O, Na, and Al) exhibit >0.5 dex abundance dispersions at all metallicities, and a majority of stars with [Fe/H]>-1.6 have [O/Fe], [Na/Fe], and [Al/Fe] abundances similar to those in monometallic globular clusters, as well as O-Na, O-Al anticorrelations and the Na-Al correlation in all but the most metal-rich stars. A combination of pollution from intermediate mass asymptotic giant branch (AGB) stars and in situ mixing may explain the light element abundance patterns. A large fraction (27%) of w Cen stars are O-poor ([O/Fe]<0) and are preferentially located within 5-10' of the cluster center. The O-poor giants are spatially similar, located in the same metallicity range, and are present in nearly equal proportions to blue main sequence stars. This suggests the O-poor giants and blue main sequence stars may share a common origin. [La/Fe] increases sharply at [Fe/H]>-1.6, and the [La/Eu] ratios indicate the increase is due to almost pure s-process production.

Accepted for publication in ApJ; 292 pages, 27 figures, 8 tables; some table columns or figure captions may run off the page in the compiled arXiv version; please email author C. Johnson at cijohnson [at] astro.ucla.edu if a cleaner copy of any data table or figure caption is desired before publication

References in corpus (29)

• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• Formation and Dynamical Evolution of Multiple Stellar Generations in Globular Clusters
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
• The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
• The exotic chemical composition of the Sagittarius dwarf Spheroidal galaxy
• Oxygen, Sodium, Magnesium and Aluminium as tracers of the Galactic Bulge Formation
• Origin of multiple stellar populations in globular clusters and their helium enrichment
• Light nuclei in galactic globular clusters : constraints on the self-enrichment scenario from nucleosynthesis
• NLTE determination of the aluminium abundance in a homogeneous sample of extremely metal-poor stars
• Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo
• Deep FORS1 observations of the double Main Sequence of omega Centauri
• A model for the Globular Cluster extreme anomalies
• Reaction rate uncertainties and the operation of the NeNa and MgAl chains during HBB in intermediate-mass AGB stars
• Origin of Abundance Inhomogeneity in Globular Clusters
• Giants in the globular cluster omega Centauri: dust production, mass loss and distance
• The Rotation of Sub-Populations in omega Centauri
• NLTE study of scandium in the Sun
• Fe and Al Abundances for 180 Red Giants in the Globular Cluster Omega Centauri (NGC 5139)
• New Metallicities of RR Lyrae Stars in omega Centauri: Evidence for a Non He-Enhanced Metal-Intermediate Population
• MCAO near-IR photometry of the Globular Cluster NGC 6388: MAD observations in crowded fields
• Dust, pulsation, chromospheres and their role in driving mass loss from red giants in Galactic globular clusters
• A spectral atlas of post-main-sequence stars in omega Centauri: kinematics, evolution, enrichment and interstellar medium
• The chemical evolution of Omega Centauri's progenitor system
• On the effect of helium enhancement on bolometric corrections and Teff-colour relations
• Modeling the chemical evolution of Omega Centauri using three-dimensional hydrodynamical simulations
• Medium resolution spectroscopy in Omega Centauri: abundances of 400 subgiant and turn-off region
• Testing the AGB Scenario as the Origin of the Extreme-Helium Population in omega Centauri

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