Marino, Anna FabiolaDa Costa, GaryCasey, AndrewAsplund, MartinBessell, MichaelFrebel, AnnaKeller, StefanLind, K.Mackey, DougalMurphy, SimonNordlander, ThomasNorris, JohnSchmidt, BrianYong, David2022-05-042022-05-040035-8711http://hdl.handle.net/1885/264526We present results from the analysis of high-resolution spectra obtained with the Keck HIRES spectrograph for a sample of 17 candidate extremely metal-poor (EMP) stars originally selected from commissioning data obtained with the SkyMapper telescope. Fourteen of the stars have not been observed previously at high dispersion. Three have [Fe/H] ≤ −3.0, while the remainder, with two more metal-rich exceptions, have −3.0 ≤ [Fe/H] ≤ −2.0 dex. Apart from Fe, we also derive abundances for the elements C, N, Na, Mg, Al, Si, Ca, Sc, Ti, Cr, Mn, Co, Ni, and Zn, and for n-capture elements Sr, Ba, and Eu. None of the current sample of stars is found to be carbon-rich. In general, our chemical abundances follow previous trends found in the literature, although we note that two of the most metal-poor stars show very low [Ba/Fe] (∼−1.7) coupled with low [Sr/Ba] (∼−0.3). Such stars are relatively rare in the Galactic halo. One further star, and possibly two others, meet the criteria for classification as a r-I star. This study, together with that of Jacobson et al. (2015), completes the outcomes of the SkyMapper commissioning data survey for EMP stars.SkyMapper research on EMP stars has been supported in part through the Australian Research Council (ARC) Discovery Grant programs DP120101237 and DP150103294 (Lead-CI Da Costa). A. F. M., A. R. C., and A. D. M. have been in part supported by ARC through the Discovery Early Career Researcher Award DE160100851, the Discovery Project DP160100637, and the Future Fellowship FT160100206, respectively. M. A. gratefully acknowledges generous funding from an ARC Laureate Fellowship (grant FL110100012). Parts of this research were conducted under the auspices of the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), which is supported through project number CE170100013. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie SkłodowskaCurie Grant Agreement No. (797100; Beneficiary: A. F. M.). The national facility capability for SkyMapper has been funded through ARC LIEF grant LE130100104 from the Australian Research Council, awarded to the University of Sydney, the Australian National University, Swinburne University of Technology, the University of Queensland, the University of Western Australia, the University of Melbourne, Curtin University of Technology, Monash University, and the Australian Astronomical Observatoryapplication/pdfen-AU© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Societystars: abundancesstars: Population IIGalaxy: haloGalaxy: stellar content201910.1093/mnras/stz6452020-12-27