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An Extremely Carbon-rich, Extremely Metal-poor Star in the Segue 1 System
John E. Norris, Gerard Gilmore, Rosemary F. G. Wyse +2
We report the analysis of high-resolution, high-S/N spectra of an extremely metal-poor, extremely C-rich red giant, Seg 1-7, in the Segue 1 system - described in the literature alt…
Chemical Enrichment in the Faintest Galaxies: the Carbon and Iron Abundance Spreads in the Boötes I Dwarf Spheroidal Galaxy and the Segue 1 System
John E. Norris, Rosemary F. G. Wyse, Gerard Gilmore +5
We present an AAOmega spectroscopic study of red giant stars in Bootes I, which is an ultra-faint dwarf galaxy, and Segue 1, suggested to be either an extremely low-luminosity dwar…
The stellar content of the Hamburg/ESO survey VI. The metallicity distribution of main-sequence turnoff stars in the Galactic halo
H. N. Li, N. Christlieb, T. Schörck +7
We determine the metallicity distribution function (MDF) of the Galactic halo based on metal-poor main-sequence turnoff-stars (MSTO) which were selected from the Hamburg/ESO object…
Abundances of C, N, Sr and Ba on the red giant branch of omega Centauri
Laura M. Stanford, Gary S. Da Costa, John E. Norris
Abundances relative to iron for carbon, nitrogen, strontium and barium are presented for 33 stars on the red giant branch of the globular cluster omega Centauri. They are based on…