EXPLORING THE ORIGIN OF LITHIUM, CARBON, STRONTIUM, AND BARIUM WITH FOUR NEW ULTRA METAL-POOR STARS

by Hansen, T., Hansen, C. J., Christlieb, N., Yong, D., Bessell, M. S., Beers, Timothy C., Placco, V. M., Norris, J. E., Asplund, M., Frebel, Anna L., Garcia Perez, A. E.
Published 2015