2306.06321 — arXiv2

GTC Follow-up Observations of Very Metal-Poor Star Candidates from DESI

astro-ph.SR

/ Published

Jun 9, 2023

/ Updated

Oct 27, 2023

/ Categories

astro-ph.SR astro-ph.GA astro-ph.IM

/ Links

/ Authors

Carlos Allende Prieto, David S. Aguado, Jonay I. González Hernández, Rafael Rebolo, Joan Najita, Christopher J. Manser, Constance Rockosi, Zachary Slepian, Mar Mezcua, Monica Valluri

and 41 more authors

Rana Ezzeddine, Sergey E. Koposov, Andrew P. Cooper, Arjun Dey, Boris T. Gänsicke, Ting S. Li, Katia Cunha, Siwei Zou, Jessica Nicole Aguilar, Steven Ahlen, David Brooks

, Todd Claybaugh

, Sarah Eftekharzadeh

, Kevin Fanning

, Jaime Forero-Romero

, Satya Gontcho A Gontcho

, Klaus Honscheid

, Pascale Jablonka

, Theodore Kisner

, Martin Landriau

, Axel de la Macorra

, Aaron Meisner

, Ramón Miquel

, John Moustakas

, Claire Poppett

, Francisco Prada

, Graziano Rossi

, Eusebio Sánchez

, Michael Schubnell

, Malgorzata Siudek

, Verne V. Smith

, Gregory Tarlé

, Fiorenzo Vincenzo

, Benjamin Alan Weaver

/ Abstract

The observations from the Dark Energy Spectroscopic Instrument (DESI) will significantly increase the numbers of known extremely metal-poor stars by a factor of ~ 10, improving the sample statistics to study the early chemical evolution of the Milky Way and the nature of the first stars. In this paper we report high signal-to-noise follow-up observations of 9 metal-poor stars identified during the DESI commissioning with the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy (OSIRIS) instrument on the 10.4m Gran Telescopio Canarias (GTC). The analysis of the data using a well-vetted methodology confirms the quality of the DESI spectra and the performance of the pipelines developed for the data reduction and analysis of DESI data.