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

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, Satya Gontcho A; 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

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.

Citation

Allende Prieto, C., Aguado, D. S., González Hernández, J. I., Rebolo, R., Najita, J., Manser, C. J., …Zou, H. (2023). GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI. Astrophysical Journal, 957(2), Article 76. https://doi.org/10.3847/1538-4357/acfa96

• Journal Article Type: Article
• Acceptance Date: Aug 7, 2023
• Online Publication Date: Nov 1, 2023
• Publication Date: Nov 10, 2023
• Deposit Date: Nov 15, 2023
• Publicly Available Date: Nov 15, 2023
• Journal: The Astrophysical Journal
• Print ISSN: 0004-637X
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 957
• Issue: 2
• Article Number: 76
• DOI: https://doi.org/10.3847/1538-4357/acfa96
• Keywords: Spectroscopy, Milky Way formation, Field stars
• Public URL: https://durham-repository.worktribe.com/output/1883948