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The cold veil of the Milky Way stellar halo (2012)
Journal Article
Deason, A., Belokurov, V., Evans, N., Koposov, S., Cooke, R., Peñarrubia, J., …Olszewski, E. (2012). The cold veil of the Milky Way stellar halo. Monthly Notices of the Royal Astronomical Society, 425(4), 2840-2853. https://doi.org/10.1111/j.1365-2966.2012.21639.x

We build a sample of distant (D > 80 kpc) stellar halo stars with measured radial velocities. Faint (20 < g < 22) candidate blue horizontal branch (BHB) stars were selected using the deep, but wide, multi-epoch Sloan Digital Sky Survey photometry. Fo... Read More about The cold veil of the Milky Way stellar halo.

The most metal-poor damped Lyα systems: insights into chemical evolution in the very metal-poor regime (2011)
Journal Article
Cooke, R., Pettini, M., Steidel, C., Rudie, G., & Nissen, P. (2011). The most metal-poor damped Lyα systems: insights into chemical evolution in the very metal-poor regime. Monthly Notices of the Royal Astronomical Society, 417(2), 1534-1558. https://doi.org/10.1111/j.1365-2966.2011.19365.x

We present a high spectral resolution survey of the most metal-poor damped Lyα absorption systems (DLAs) aimed at probing the nature and nucleosynthesis of the earliest generations of stars. Our survey comprises 22 systems with iron abundance less th... Read More about The most metal-poor damped Lyα systems: insights into chemical evolution in the very metal-poor regime.