Year-end Sale % OFF 
Abstract
ABSTRACT This paper reviews many of the properties relating to the chemical inhomogeneity of globular clusters. Three main types of anomalous stars are found within clusters: the CH stars, weak-G-band stars, and giants with enhanced CN bands. Of these, the CN-enhanced giants are the most common, while the CH stars are the rarest. A number of characteristics of these stars, including the relationship between the carbon and nitrogen abundances; correlations between CN enhancements and atomic line strengths; and the stellar luminosity dependence of C and N abundances, are discussed. The cluster Omega Cen not only contains all three types of the above-mentioned stars but also exhibits a much wider variety of abundance anomalies, including star-to-star iron-peak element variations and the presence of a radial CN gradient. A number of the characteristics of the Omega Cen inhomogeneity are described. Possible mechanisms for establishing internal cluster-abundance variations are summarized, and arguments for and against two of the most popular of these, the mixing and primordial-enrichment hypotheses, are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Publications of the Astronomical Society of the Pacific
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
