An extremely carbon-rich, extremely metal-poor star in the Segue 1 system
Norris, John; Gilmore, Gerard; Wyse, Rosemary F G; Yong, David; Frebel, Anna
We report the analysis of high-resolution, high signal-to-noise ratio, spectra of an extremely metal-poor, extremely C-rich red giant, Seg 1-7, in Segue 1 - described in the literature alternatively as an unusually extended globular cluster or an ultra-faint dwarf galaxy. The radial velocity of Seg 1-7 coincides precisely with the systemic velocity of Segue 1, and its chemical abundance signature of [Fe/H] = -3.52, [C/Fe] = +2.3, [N/Fe] = +0.8, [Na/Fe] = +0.53, [Mg/Fe] = +0.94, [Al/Fe] = +0.23,...[Show more]
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|Source:||Astrophysical Journal, The|
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