2006/11/16 by Laura M. Stanford, G. S. Da Costa, John E. Norris +2 · 1 citation
Chemistry · Physics and Astronomy · #Abundance (ecology) #Astro and Planetary Science #Astronomy and Astrophysical Research #Astrophysics #Barium #Biology #Chemistry #Globular cluster #Inorganic chemistry #Metallicity #Physics #Stars #Stellar, planetary, and galactic studies #Strontium #astro-ph
paper · pdf · doi:10.1086/510530
published as Astrophys.J.653:L117-L120,2006 · 13 pages, 3 figures. Accepted to ApJL
arxiv created 2006/11/16 · openalex publication_date 2006/12/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abundance ratios relative to iron for carbon, nitrogen, strontium, and barium are presented for a metal-rich main-sequence star ([Fe/H] = -0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen but, more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ≈ 1.6 dex, while the barium abundance ratio is [Ba/Fe] ≤ 0.6 dex. At this metallicity one usually sees strontium and barium abundance ratios that are roughly equal. Possible formation scenarios of this peculiar object are considered.