AUTHOR=Ashraf Muhammad Zeshan , Cui Wenyuan , Li Hongjie 

TITLE=The origins of neutron-capture elements in globular cluster M22

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 12 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2025.1663125

DOI=10.3389/fspas.2025.1663125

ISSN=2296-987X

ABSTRACT=IntroductionThe chemical abundances of metal poor (MP) stars in globular clusters provide valuable information for constraining their evolutionary scenarios.MethodsUsing both main r-process and weak r-process patterns, we fit the abundances of s-poor stars in the globular cluster M22.Results and discussionThe 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 (Cs) with increasing [Fe/H] suggests a gradual increase in the contribution from low-mass AGB stars.