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Projeto Observacional para 2018A - SO2018A-006

Autor: Henrique M Reggiani
Instituição: IAG
e-mail: hreggiani@gmail.com

Jorge Melendez-Moreno

Título: Finding bright relics of the early Universe

Resumo: Very metal-poor stars are the oldest relics of the early Universe and therefore provide direct insight on Big Bang nucleosynthesis, the formation and evolution of our Milky Way, on constraining the nature of the first stars, and on nucleosynthetic products of the first supernovae and hypernovae. Although there are several projects hunting for metal-poor stars, they are mostly based on relatively faint targets. This project aims to find bright (V < 12) very metal-poor stars ([Fe/H] < -2.5). Our metal-poor candidates were selected via a photometric method, which relies on the GAIA G and 2MASS K bands photometry. Goodman/SOAR spectra of such bright stars will not only allow na accurate and high precision metallicity determination, but will also provide chemical abundances of some key elements, like carbon, allowing us to assess whether the newly discovered metal-poor stars are carbon enhanced metal-poor stars.