3 papers
astro-ph.SR2025
The Origins of Neutron-capture Elements In Globular Cluster M22
Muhammad Zeshan Ashraf, Wenyuan Cui, Hongjie Li
The chemical abundances of metal-poor stars in globular clusters provide important constraints on their evolutionary scenarios. Using both main r-process and weak r-process pattern…
astro-ph.SR2025
The Abundance Origin Of A Highly r-process-Enhanced r-II Star: LAMOST J020623.21+494127.9
Muhammad Zeshan Ashraf, Wenyuan Cui, Hongjie Li
Object LAMOST J020623.21+494127.9 (program star) in the thin disk of the Milky Way (MW) is reported as a highly r-process-enhanced (RPE) r-II star with[Eu/Fe]= +1.32 and [Fe/H]= -0…
astro-ph.SR2018
Formation of the Abundance Boundaries of the Heavier Neutron-capture Elements in Metal-poor Stars
Guochao Yang, Hongjie Li, Nian Liu +5
The abundance scatter of heavier r-process elements (Z > 56) relative to Fe ([r/Fe]) in metal-poor stars preserves excellent information of the star formation history and provides…