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

Bibcode
2023ApJ...957...76A
DOI
10.3847/1538-4357/acfa96
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
Bibliographical reference

The Astrophysical Journal

Advertised on:
11
2023
Journal
The Astrophysical Journal
Number of authors
51
IAC number of authors
4
Citations
1
Refereed citations
0
Description
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.
Related projects
spectrum of mercury lamp
Chemical Abundances in Stars

Stellar spectroscopy allows us to determine the properties and chemical compositions of stars. From this information for stars of different ages in the Milky Way, it is possible to reconstruct the chemical evolution of the Galaxy, as well as the origin of the elements heavier than boron, created mainly in stellar interiors. It is also possible to

Carlos
Allende Prieto
In progress
Type
Refereed
Spectroscopy
Milky Way formation
Stellar & Interstellar Physics (FEEI)

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