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2006ApJ...653L.117S - Astrophys. J., 653, L117-L120 (2006/December-3)
A Sr-rich star on the main sequence of ω Centauri.
STANFORD L.M., DA COSTA G.S., NORRIS J.E. and CANNON R.D.
Abstract (from CDS):
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.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: Globular Clusters: General - Galaxy: Globular Clusters: Individual: Name: ω Centauri
Simbad objects: 3
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