Abundance Variations within Globular Clusters

By R. Gratton, C. Sneden, E. Carretta. 2004

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In Astronomy and Astrophysics

Citations in the corpus

Oxygen, Sodium, Magnesium and Aluminium as tracers of the Galactic Bulge Formation (2006, background): “We also briefly compare our results with earlier works on the bulge stars: (i) the seminal work of McWilliam & Rich (1994) for 12 cool RGB stars studied at lower resolution (R∼20000); (ii) the infrared spectral analysis of 14 bulge M giants from Rich & Origlia (2005), although this study has a small”
An Abundance Analysis of Bright Giants in the Globular Cluster NGC 1851 (2007, background): “Although there are large starto-star abundance variations of O, Na, and Al in NGC 2808 (Carretta 2006), such patterns are ubiquitous in Galactic globular clusters (e.g., Kraft 1994; Gratton et al. 2004).”
The Double Subgiant Branch of NGC 1851: The Role of the CNO Abundance (2007, background): “…(GCs) have shown that surface abundance variations of C, N, O, Na, and often also of Mg and Al exist in stars within individual clusters (see, e.g., Gratton et al. 2004), and that these elements display a pattern of abundance variations that is constant along the red giant branch (RGB) and down to…”
Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters (2006, background): “…C, N, O, Na, Mg and Al abundances show large star-to-star abundance variations within all the individual GCs studied up to now (for complete references see the early reviews by Freeman & Norris 1981; Smith 1987; and Kraft 1994; and the more recent ones by Gratton et al. 2004; and Charbonnel 2005).”
Spectroscopic and photometric evidence of two stellar populations in the Galactic globular cluster NGC 6121 (M 4) (2008, background): “Sodium and Oxygen show the typical anticorrelation found in many other GCs (Gratton et al. 2004), as shown in Fig.”
MULTIPLE STELLAR POPULATIONS IN 47 Tucanae (2011, background): “…not yet reached sufficiently high temperatures in their interiors, suggests that more than one generation of stars has formed within Galactic GCs (see Gratton et al. 2004 for a review), possibly in combination with accretion onto low-mass stars of ejecta from either intermediate-mass stars…”
The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars (2014, background): “100Myr) has implicated them as potential polluters of Galactic globular clusters (GCs), which show abundance trends consistent with hot H burning (Gratton et al. 2004, 2012; Prantzos et al. 2007).”
The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851 (2007, background): “Although anomalies had been noted from time to time in the abundances of a number of individual elements (see discussion in Gratton et al. 2004), the description of populations in terms of a helium abundance and an overall heavy-element abundance seemed firm.”
Chemical similarities between Galactic bulge and local thick disk red giants: O, Na, Mg, Al, Si, Ca, and Ti (2010, background): “As pointed out by Fulbright et al. (2007), two O-deficient stars (I-264 and IV-203) at [Fe/H] ≈ −1.25 have peculiar abundances similar to the O-Na anti-correlation seen in globular clusters (e.g. Gratton et al. 2004; Cohen & Meléndez 2005; Yong et al.”
Chemical Similarities Between Galactic Bulge And Local Thick Disk Red Giant Stars (2008, background): “It is then surprising that their [C+N/Fe] ratios are normal or only marginally higher as O-depletion in globular cluster stars is associated with increased [N/Fe] ratios due to CNO-cycling (Gratton et al. 2004, and references therein).”
Chemical abundance analysis of the open clusters Cr 110, NGC 2099 (M 37), NGC 2420, NGC 7789, and M 67 (NGC 2682) (2009, background): “In fact Al and Na, together with Mg and O (and C and N) show puzzling (anti)-correlations in almost all of the studied Galactic Globular Clusters (Gratton et al., 2004).”
A stellar census in globular clusters with MUSE: multiple populations chemistry in NGC 2808 (2019, methodology): “C anticorrelations (see reviews by Gratton et al. 2004, 2012).”
Properties of stellar generations in globular clusters and relations with global parameters (2010, background): “For almost forty years, we have known that large star-to-star abundance variations for several light elements are present in GCs (see Gratton et al. 2004, for a recent review).”
The s process: Nuclear physics, stellar models, and observations (2010, neutral): “The Ba and Eu abundances measured in globular clusters have been summarized by Gratton et al. (2004).”
Abundances in giant stars of the globular cluster NGC 6752 (2005, positive): “3 in Gratton et al. (2004) shows that our mean ratios for NGC 6752 [Mn/Fe] = −0.45 and [Cu/Fe] = −0.61 are in very good agreement with other globular clusters and field stars at the metallicity of NGC 6752 [Fe/H] = −1.61.”