Nucleosynthesis in the Stellar Systems omega Cen and M22

Abstract

The stellar system omega Centauri is well known for the large range in abundance among its member stars. Recent work has indicated that the globular cluster M22 (NGC 6656) also possesses an internal abundance range, albeit substantially smaller than that in omega Cen. Here we compare, as a function of [Fe/H], element-to-iron ratios in the two systems for a number of different elements using data from abundance analyses of red giant branch stars. It appears that the nucleosynthetic enrichment processes were very similar in these two systems despite the substantial difference in total mass.

12 pages, 7 figures, accepted for publication in Publications of the Astronomical Society of Australia (PASA)

References in corpus (12)

• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• Two Stellar Components in the Halo of the Milky Way
• Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
• Detailed abundances of a large sample of giant stars in M 54 and in the Sagittarius nucleus
• The nucleus of the Sagittarius dSph galaxy and M54: a window on the process of galaxy nucleation
• Origin of multiple stellar populations in globular clusters and their helium enrichment
• An abundance analysis of bright giants in the globular cluster NGC 1851
• Abundances for a large sample of red giants in NGC 1851: hints for a merger of two clusters?
• New HST WFC3/UVIS observations augment the stellar-population complexity of omega Centauri
• A model for the Globular Cluster extreme anomalies
• Neutron-capture elements in the metal-poor globular cluster M15
• The chemical evolution of Omega Centauri's progenitor system

Cited by in corpus (23)

• The Dawes Review 2: Nucleosynthesis and stellar yields of low and intermediate-mass single stars
• The two metallicity groups of the globular cluster M22: a chemical perspective
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. II. The seven stellar populations of NGC7089 (M2)
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XIX. A Chemical Tagging of the Multiple Stellar Populations Over the Chromosome Maps
• The double sub-giant branch of NGC 6656 (M22): a chemical characterization
• A chemical trompe-l'œil: no iron spread in the globular cluster M22
• Chemical abundances in bright giants of the globular cluster M62 (NGC 6266)
• C and N abundances of MS and SGB stars in NGC 1851
• NGC 5824: a luminous outer halo globular cluster with an intrinsic abundance spread
• The oxygen vs. sodium (anti)correlation(s) in omega Cen
• The double RGB in M 2: C, N, Sr and Ba abundances
• Nucleosynthesis in helium-enriched asymptotic giant branch models: Implications for Heavy Element Enrichment in Omega Centauri
• Magnesium Isotope Ratios in omega Centauri Red Giants
• Fluorine variations in the globular cluster NGC 6656 (M22): implications for internal enrichment timescales
• Horizontal-branch morphology and multiple stellar populations in the anomalous globular cluster M22
• Gaia and Hubble unveil the kinematics of stellar populations in the Type II globular clusters ω Centauri and M 22
• Spectroscopy and photometry of the least-massive Type-II globular clusters: NGC1261 AND NGC6934
• Evolution and nucleosynthesis of helium-rich asymptotic giant branch models
• Carbon and nitrogen abundances of stellar populations in the globular cluster M 2
• The s-Process Enrichment of the Globular Clusters M4 and M22
• Are the globular clusters with significant internal [Fe/H] spreads all former dwarf galaxy nuclei?
• Simulations of globular clusters within their parent galaxies: Metallicity spreads and anomalous precursor populations
• Abundance ties: Nephele and the globular cluster population accreted with $\omega$ Cen. Based on APOGEE DR17 and Gaia EDR3