Bibcode
Dell'Agli, F.; García-Hernández, D. A.; Ventura, P.; Mészáros, Sz; Masseron, T.; Fernández-Trincado, J. G.; Tang, B.; Shetrone, M.; Zamora, O.; Lucatello, S.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 3, p.3098-3116
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4
2018
Citations
26
Refereed citations
22
Description
We discuss the self-enrichment scenario by asymptotic giant branch (AGB)
stars for the formation of multiple populations in globular clusters
(GCs) by analysing data set of giant stars observed in nine Galactic
GCs, covering a wide range of metallicities and for which the
simultaneous measurements of C, N, O, Mg, Al, and Si are available. To
this aim, we calculated six sets of AGB models, with the same chemical
composition as the stars belonging to the first generation of each GC.
We find that the AGB yields can reproduce the set of observations
available, not only in terms of the degree of contamination shown by
stars in each GC but, more important, also the observed trend with
metallicity, which agrees well with the predictions from AGB evolution
modelling. While further observational evidences are required to
definitively fix the main actors in the pollution of the interstellar
medium from which new generation of stars formed in GCs, the present
results confirm that the gas ejected by stars of mass in the range 4
M_{⊙} ≤ M ≤ 8 M_{⊙} during the AGB phase share the same
chemical patterns traced by stars in GCs.
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