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

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arxiv 2306.06321 v3 pith:NBJMDQWZ submitted 2023-06-09 astro-ph.SR astro-ph.GAastro-ph.IM

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

classification astro-ph.SR astro-ph.GAastro-ph.IM
keywords desidatametal-poorobservationsstarsanalysisfollow-upinstrument
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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