The link between chemical anomalies along the red giant branch and the horizontal branch extension in globular clusters

Abstract

We find a strong correlation between the extension of the Na-O anticorrelation observed in red giant branch (RGB) stars and the high temperature extension of the horizontal branch (HB) blue tails of Galactic globular clusters (GCs). The longer is the O-depleted tail of the Na-O anticorrelation observed in the RGB stars, the higher is the maximum temperature reached by the bluest HB stars in the GC. This result provides a clear, empirical evidence of a link between the extension of the HB and the presence of star-to-star abundance variations of proton-capture elements in GC stars. We discuss the possible interpretation of this correlation.

arXiv commentComments: 6 pages, 1 figure, uses emulateapj.cls; accepted for publication in the Astrophysical Journal Letters

References in corpus (23)

• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• A Triple Main Sequence in the Globular Cluster NGC 2808
• Omega Centauri: The Population Puzzle Goes Deeper
• The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
• Helium variation due to self-pollution among Globular Cluster stars: consequences on the horizontal branch morphology
• HST color-magnitude diagrams of 74 galactic globular clusters in the HST F439W and F555W bands
• Galactic Globular Cluster Relative Ages. II
• Abundances in a Large Sample of Stars in M3 and M13
• Abundances in Stars from the Red Giant Branch Tip to Near the Main Sequence Turn Off in M71: III. Abundance Ratios
• The Chemical Composition Contrast between M3 and M13 Revisited: New Abundances for 28 Giant Stars in M3
• Na-O Anticorrelation And HB I. The Na-O anticorrelation in NGC 2808
• Abundances of C, N, O in slightly evolved stars in the globular clusters NGC 6397, NGC 6752 and 47 Tuc
• Abundance Analysis of Turn-Off and Early Subgiant Stars in the Globular Cluster 47 Tuc (NGC 104)
• Abundances in red giant stars of NGC 2808 and correlations between chemical anomalies and global parameters in globular clusters
• C and N Abundances in Stars At the Base of the Red Giant Branch in M5
• Multivariate Analysis of Globular Cluster's Horizontal Branch Morphology: searching for the second parameter
• Na-O Anticorrelation and HB. II. The Na-O anticorrelation in the globular cluster NGC 6752
• Galactic Globular Cluster Stars: from Theory to Observation
• Na-O Anticorrelation and Horizontal Branches. V. The Na-O anticorrelation in NGC 6441 from Giraffe spectra
• Na-O Anticorrelation and HB. IV. Detection of He-rich and He-poor stellar populations in the globular cluster NGC 6218
• Spectroscopy of horizontal branch stars in NGC6752 - Anomalous results on atmospheric parameters and masses
• Proton capture elements in the globular cluster NGC 2808 I. First detection of large variations in Sodium abundances along the Red Giant Branch
• A Robust Test of Evolution near the Tip of the Red Giant Branch and Missing Giants in NGC 2808

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• G2C2 - IV: A novel approach to study the radial distributions of multiple populations in Galactic globular clusters
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