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astro-ph.SR2025
Distinct barium isotope ratios in CEMP-s and CEMP-rs stars
T. M. Sitnova, L. I. Mashonkina, A. M. Romanovskaya +2
We present a spectroscopic analysis of ten carbon enhanced metal-poor (CEMP) stars of type CEMP-s and CEMP-rs and determine their NLTE abundances of Ba and Eu, as well as the fract…
astro-ph.SR2025
Unlocking the mystery of Sr synthesis in the early Galaxy through analysis of barium isotopes in very metal-poor stars
T. M. Sitnova, L. Lombardo, L. I. Mashonkina +8
We determine the contributions of the rapid (r) and slow (s) neutron capture processes to the Ba isotope mixture, along with Ba, Eu, and Sr NLTE abundances, in a sample of very met…
astro-ph.SR2024
Slowly Rotating Peculiar Star BD+001659 as a Benchmark for Stratification Studies in Ap/Bp Stars
A. Romanovskaya, T. Ryabchikova, Y. Pakhomov +2
We present the results of a self-consistent analysis of the magnetic silicon star BD+001659, based on its high-resolution spectra taken from the ESPaDOnS archive (R = 68,00…