ORIGINAL RESEARCH article
Front. Astron. Space Sci.
Sec. Stellar and Solar Physics
Volume 12 - 2025 | doi: 10.3389/fspas.2025.1663125
This article is part of the Research TopicChemical Diversity of Circumstellar Envelopes Around Evolved StarsView all 6 articles
The Origins of Neutron-capture Elements In Globular Cluster M22
Provisionally accepted
- 1Hebei Normal University, Shijiazhuang, China
- 2Hebei University of Science and Technology, Shijiazhuang, China
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The chemical abundances of metal-poor (MP) stars in globular clusters provide valuable information for constraining their evolutionary scenarios. Using both main r-process and weak r-process patterns, we fit the abundances of s-poor stars in the globular cluster M22. The coefficients of the main and weak r-process components are nearly constant for the sample stars, including s-rich stars. By considering the contribution of the s-process from low-mass AGB stars, the abundances of s-rich stars in M22 can also be fitted effectively. Furthermore, the increasing trend in the s-process component coefficients (C s ) with increasing [Fe/H] suggests a gradual increase in the contribution from low-mass AGB stars.
Keywords: Nucleosynthesis, metal poor stars, main s-process, main r-process, weak r-process
Received: 10 Jul 2025; Accepted: 06 Aug 2025.
Copyright: © 2025 Ashraf, Cui and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Wenyuan Cui, Hebei Normal University, Shijiazhuang, China
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