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

DOI: 
10.3847/1538-4357/acfa96
Publication date: 
11/11/2023
Main author: 
Allende Prieto, Carlos
IAA authors: 
Prada, Francisco
Authors: 
Allende Prieto, Carlos;Aguado, David S.;González Hernández, Jonay I.;Rebolo, Rafael;Najita, Joan;Manser, Christopher J.;Rockosi, Constance;Slepian, Zachary;Mezcua, Mar;Valluri, Monica;Ezzeddine, Rana;Koposov, Sergey E.;Cooper, Andrew P.;Dey, Arjun;Gänsicke, Boris T.;Li, Ting S.;Cunha, Katia;Zou, Siwei;Aguilar, Jessica Nicole;Ahlen, Steven;Brooks, David;Claybaugh, Todd;Cole, Shaun;Eftekharzadeh, Sarah;Fanning, Kevin;Forero-Romero, Jaime;Gontcho a Gontcho, Satya;Honscheid, Klaus;Jablonka, Pascale;Kehoe, Robert;Kisner, Theodore;Landriau, Martin;de la Macorra, Axel;Meisner, Aaron;Miquel, Ramón;Moustakas, John;Nie, Jundan;Poppett, Claire;Prada, Francisco;Rezaie, Mehdi;Rossi, Graziano;Sánchez, Eusebio;Schubnell, Michael;Sharples, Ray;Siudek, Malgorzata;Smith, Verne V.;Tarlé, Gregory;Vincenzo, Fiorenzo;Weaver, Benjamin Alan;Zhou, Zhimin;Zou, Hu
Journal: 
The Astrophysical Journal
Publication type: 
Article
Volume: 
957
Pages: 
76
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 follow-up observations with high signal-to-noise ratio of nine metal-poor stars identified during the DESI commissioning with the Optical System for Imaging and Low-Resolution Integrated Spectroscopy (OSIRIS) instrument on the 10.4 m Gran Telescopio Canarias. 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.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2023ApJ...957...76A/abstract
ADS Bibcode: 
2023ApJ...957...76A
Keywords: 
Spectroscopy;Field stars;Milky Way formation;1558;2103;1053;Astrophysics - Solar and Stellar Astrophysics;Astrophysics - Astrophysics of Galaxies;Astrophysics - Instrumentation and Methods for Astrophysics