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Paper: Metal-Poor Stars
Volume: 393, New Horizons in Astronomy: Frank N. Bash Symposium 2007
Page: 63
Authors: Frebel, A.
Abstract: The abundance patterns of metal-poor stars provide a wealth of chemical information about various stages of the chemical evolution of the Galaxy. In particular, these stars allow us to study the formation and evolution of the elements and the involved nucleosynthetic processes. This knowledge is invaluable for our understanding of cosmic chemical evolution and the onset of star- and galaxy formation. Metal-poor stars are the local equivalent of the high-redshift Universe, and offer crucial observational constraints on the nature of the first stars. This review presents the history of the first discoveries of metal-poor stars that laid the foundation to this field. Observed abundance trends at the lowest metallicities are described, as well as particular classes of metal-poor stars such as r-process and C-rich stars. Scenarios on the origins of the abundances of metal-poor stars and the application of large samples of metal-poor stars to cosmological questions are discussed.
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