Abundance Variations within Globular Clusters
@article{Gratton2004AbundanceVW, title={Abundance Variations within Globular Clusters}, author={Raffaele Gratton and Christopher Sneden and Eugenio Carretta}, journal={Annual Review of Astronomy and Astrophysics}, year={2004}, volume={42}, pages={385-440} }
▪ Abstract Abundance variations within globular clusters (GCs), and of GC stars with respect to field stars, are important diagnostics of a variety of physical phenomena, related to the evolution of individual stars, mass transfer in binary systems, and chemical evolution in high density environments. The broad astrophysical implications of GCs as building blocks of our knowledge of the Universe make a full understanding of their history and evolution basic in a variety of astrophysical fields…
Figures and Tables from this paper
661 Citations
The ages of Galactic globular clusters in the context of self-enrichment
- PhysicsProceedings of the International Astronomical Union
- 2008
Abstract A significant fraction of stars in globular clusters (about 70%-85%) exhibit peculiar chemical patterns, with strong abundance variations in light elements along with constant abundances in…
Origin of abundance inhomogeneity in globular clusters
- Physics
- 2007
We numerically investigate abundance properties of the Galactic globular clusters (GCs) by adopting a new “external pollution” scenario. In this framework, GCs are assumed to originate in forming…
The role of AGB stars in the evolution of globular clusters
- PhysicsProceedings of the International Astronomical Union
- 2018
Abstract The results from high-resolution spectroscopy and accurate photometry have challenged the traditional paradigm that stars in globular clusters (GC) are simple stellar populations, rather…
Chemical Abundance Inhomogeneities in Globular Cluster Stars
- Physics
- 2006
It is now clear that abundance variations from star-to-star among the light elements, particularly C, N, O, Na and Al, are ubiquitous within galactic globular clusters; they appear seen whenever data…
Properties of stellar generations in globular clusters and relations with global parameters
- Physics
- 2010
We revise the scenario of the formation of Galactic globular clusters (GCs) by adding the observed detailed chemical composition of their different stellar generations to the set of their global…
APOGEE chemical abundances of globular cluster giants in the inner Galaxy
- Physics
- 2017
We report chemical abundances obtained by Sloan Digital Sky Survey (SDSS)-III/Apache Point Observatory Galactic Evolution Experiment for giant stars in five globular clusters located within 2.2 kpc…
Light-element Abundance Variations in the Milky Way Halo
- Physics
- 2010
We present evidence for the contribution of high-mass globular clusters to the stellar halo of the Galaxy. Using SDSS-II/SEGUE spectra of over 1900 G- and K-type halo giants, we identify for the…
Potassium abundances in multiple stellar populations of the globular cluster NGC 4833
- PhysicsAstronomy & Astrophysics
- 2021
NGC 4833 is a metal-poor Galactic globular cluster (GC) whose multiple stellar populations present an extreme chemical composition. The Na-O anti-correlation is quite extended, which is in agreement…
Globular cluster abundances: the imprint of first-generation massive stars
- PhysicsProceedings of the International Astronomical Union
- 2009
Abstract Galactic globular cluster (GC) stars exhibit abundance patterns that are not shared by their field counterparts, namely the well-documented O–Na, C–N and Mg–Al anticorrelations. Recent…
Spectroscopy of Binaries in Globular Clusters
- Physics
- 2020
The natural constants in the universe are adjusted so that dense and massive star forming regions can end up in gravitational bound star clusters, called globular clusters. These objects are found in…
References
SHOWING 1-10 OF 441 REFERENCES
Hot Stars in Globular Clusters: A Spectroscopist’s View
- Physics
- 2001
Globular clusters are ideal laboratories to study the evolution of low-mass stars. In this work we concentrate on three types of hot stars observed in globular clusters: horizontal branch stars,…
Abundance Differences among Globular Cluster Giants: Primordial vs. Evolutionary Scenarios
- Physics
- 1994
Contrary to historical expectation, stars within a given globular cluster often exhibit wide variations in the abundance of C, N, and O as well as certain light metals, particularly Na and Al. Owing…
Accretion of gas by globular cluster stars
- Physics
- 2002
Received date; accepted date Abstract. Some recent observations of the abundances of s-process, r-process, and α elements in metal-poor stars have led to a new scenario for their formation. According…
Elemental Abundances in Five Stars in M54, A Globular Cluster Associated with the Sagittarius Galaxy
- Physics
- 1999
Chemical abundances in five stars in M54, a globular cluster associated with the Sagittarius dwarf galaxy, have been determined using high-resolution echelle spectra. We find the cluster to have…
Striking Photospheric Abundance Anomalies in Blue Horizontal-Branch Stars in Globular Cluster M13
- Physics
- 1999
High-resolution optical spectra of 13 blue horizontal-branch stars in the globular cluster M13 show enormous deviations in element abundances from the expected cluster metallicity. In the hotter…
The Chemical Composition of Stars in Globular Clusters: A Glimpse at the Contribution by Population III?
- Physics
- 1983
We present detailed analyses for stars in seven globular clusters, bringing the total number of globular clusters analyzed using high resolution spectroscopy and model atmospheres to 23.…
THE CHEMICAL INHOMEGENEITY OF GLOBULAR CLUSTERS.
- Physics
- 1987
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,…
The Chemical Evolution of the Globular Cluster ω Centauri (NGC 5139)
- Physics
- 2000
We present abundances for 22 chemical elements in 10 red giant members of the massive Galactic globular cluster ω Centauri. The spectra are of relatively high spectral resolution and signal-to-noise.…
Hot stars in globular clusters
- Physics
- 1995
Globular clusters are ideal laboratories to study the evolution of low-mass stars. In this review, I shall concentrate on two types of hot stars observed in globular clusters: horizontal branch stars…
Sodium abundance variations in main-sequence stars of the globular cluster 47 Tucanae
- Physics, GeologyNature
- 1996
GALACTIC globular clusters were once thought to be chemically homogeneous, having formed quite rapidly from relatively small condensations of primordial gas29. In many clusters, significant…