Searching for metal-poor stars
Résumé
Metal-poor stars are fundamental objects to understand the formation and the chemical evolution of the Milky Way. They hold in their atmospheres the fossil record of the chemical composition of the early phases of the Universe so that their chemical analysis provides important constraints on the masses of the first stellar generation. Metal-poor stars are rare objects; to dig them out different techniques has been used and large amounts of data have to be processed. I will briefly summarise my experience by selecting EMP candidates from low-resolution spectroscopy, from photometry and from kinematics. I will also present the detailed chemical investigation of three stars selected from their high speed. One of these stars show the chemical peculiarities of second generation stars in globular clusters.
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