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Why the globular cluster NGC 6752 contains no sodium-rich second-generation AGB star

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arxiv 1309.2073 v1 pith:47I7BYPK submitted 2013-09-09 astro-ph.SR

Why the globular cluster NGC 6752 contains no sodium-rich second-generation AGB star

Corinne Charbonnel , William Chantereau , Thibaut Decressin , Georges Meynet , Daniel Schaerer This is my paper
classification astro-ph.SR
keywords globularsodium-richalongbranchclustergiantobservedpopulations
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(Abridged) Globular clusters host multiple stellar populations showing different sodium enrichments. These various populations can be observed along the main sequence, red giant and horizontal branch phases. Recently it was shown, however, that at least in the globular cluster NGC 6752, no sodium-rich stars are observed along the early asymptotic giant branch, posing an apparent problem for stellar evolution. We present an explanation for this lack of sodium-rich stars in this region of the colour-magnitude diagram.

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Cited by 1 Pith paper

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  1. Multiple populations along the asymptotic giant branch: a Gaia+APOGEE study of 22 Galactic globular clusters

    astro-ph.GA 2026-07 conditional novelty 6.5

    In nine of 22 globular clusters the most extreme second-population stars are underrepresented on the AGB relative to the RGB, with anomalous stars showing even stronger AGB-manqué signatures.