The Pristine survey -- XII: Gemini-GRACES chemo-dynamical study of newly discovered extremely metal-poor stars in the Galaxy

Collin L. Kielty*, Kim A. Venn, Federico Sestito, Else Starkenburg, Nicolas F. Martin, David S. Aguado, Anke Arentsen, Sébastien Fabbro, Jonay I. González Hernández, Vanessa Hill, Pascale Jablonka, Carmela Lardo, Lyudmila I. Mashonkina, Julio F. Navarro, Chris Sneden, Guillaume F. Thomas, Kris Youakim, Spencer Bialek, Rubén Sánchez-Janssen

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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High-resolution optical spectra of 30 metal-poor stars selected from the \Pristine\ survey are presented, based on observations taken with the Gemini Observatory GRACES spectrograph. Stellar parameters \teff and \logg are determined using a Gaia DR2 colour-temperature calibration and surface gravity from the Stefan-Boltzmann equation. GRACES spectra are used to determine chemical abundances (or upper-limits) for 20 elements (Li, O, Na, Mg, K, Ca, Ti, Sc, Cr, Mn, Fe, Ni, Cu, Zn, Y, Zr, Ba, La, Nd, Eu). These stars are confirmed to be metal-poor ([Fe/H]$
Originele taal-2English
Pagina's (van-tot)1438-1461
TijdschriftMonthly Notices of the Royal Astronomical Society
StatusPublished - 25-jun.-2021

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