Context. Masses are one of the most difficult stellar properties to measure. In the case of the
white-dwarf (WD) companions of Barium (Ba) stars, the situation is worse. These stars are …

ABSTRACT Milky Way globular clusters (GCs) display chemical enrichment in a
phenomenon called multiple stellar populations (MSPs). While the enrichment mechanism is …

Context. 56 UMa is a wide binary system that contains a chemically peculiar red giant and a
faint companion. Due to its surface chemical abundances, the red giant was classified as a …

We present detailed chemical compositions of four stars on the first-ascent red giant branch
that are classified as chemically peculiar, but lack comprehensive analyses at high spectral …

Context. Barium (Ba) stars are characterised by an abundance of heavy elements made by
the slow neutron capture process (s-process). This peculiar observed signature is due to the …

Stellar models predict that lithium (Li) inside a star is destroyed during the first dredge-up
phase, yet 1.2% of red giant stars are Li-rich. We aim to uncover possible origins of this …

Theoretical predictions of the population of Galactic symbiotic stars (SySts) are highly
inconsistent with the current known population. Despite intense effort over the past decades …

Abstract TU Tau (= HD 38218= HIP 27135) is a binary system consisting of a CN carbon star
primary and an A-type secondary. We report on new photometry and spectroscopy which …

Classical barium stars are red giants that received from their evolved binary companions
material exposed to the slow neutron-capture nucleosynthesis, ie, the s-process. Such a …

The success of galactic archeology and the reconstruction of the formation history of our
Galaxy relies critically on precise ages for large populations of stars. For evolved stars in the …