HE2159-0551: a very metal-poor peculiar low Ba giant — a candidate from the LMS-1/Wukong

[2509.07091] HE2159-0551: a very metal-poor peculiar low Ba giant — a candidate from the LMS-1/Wukong Skip to main content We gratefully acknowledge support from the Simons Foundation, member institutions , and all contributors.
We find a low Ba abundance (s-process element) and a suppressed contamination of r-process elements, even though r-process enrichment may be expected in very metal-poor stars.
The orbital parameters and kinematic properties indicate that HE2159-0551 is a thick disc star, connected to the old and metal-poor LMS-1/Wukong progenitor resulting from an early merger.
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