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Extreme enhancements of r-process elements in the cool metal-poor main-sequence star SDSS J2357-0052

Aoki, Wako; Beers, Timothy C; Honda, Satoshi; Carollo, Daniela


We report the discovery of a cool metal-poor, main-sequence star exhibiting large excesses of r-process elements. This star is one of the two newly discovered cool subdwarfs (effective temperatures of 5000 K) with extremely low metallicity ([Fe/H] < -3) identified from follow-up high-resolution spectroscopy of metal-poor candidates from the Sloan Digital Sky Survey. SDSS J2357-0052 has [Fe/H]= -3.4 and [Eu/Fe]= +1.9, and exhibits a scaled solar r-process abundance pattern of heavy...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/2041-8205/723/2/L201


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