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

IF 4.8 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Pub Date : 2023-11-01 DOI:10.3847/1538-4357/acfa96

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, 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, Shaun Cole, Sarah Eftekharzadeh, Kevin Fanning, Jaime Forero-Romero, Satya Gontcho A Gontcho, Klaus Honscheid, Pascale Jablonka, Robert Kehoe, Theodore Kisner, Martin Landriau, Axel de la Macorra, Aaron Meisner, Ramón Miquel, John Moustakas, Jundan Nie, Claire Poppett, Francisco Prada, Mehdi Rezaie, Graziano Rossi, Eusebio Sánchez, Michael Schubnell, Ray Sharples, Malgorzata Siudek, Verne V. Smith, Gregory Tarlé, Fiorenzo Vincenzo, Benjamin Alan Weaver, Zhimin Zhou, Hu Zou

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Abstract

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.

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来自DESI的极贫金属候选恒星的GTC后续观测

暗能量光谱仪器(DESI)的观测结果将使已知的极贫金属恒星的数量显著增加~ 10倍，从而改善样本统计，以研究银河系的早期化学演化和第一批恒星的性质。在本文中，我们报道了在10.4 m加那利望远镜上使用光学成像系统和低分辨率集成光谱(OSIRIS)仪器进行DESI调试期间发现的9颗金属贫星的高信噪比后续观测。使用经过严格审查的方法对数据进行分析，证实了DESI光谱的质量以及为DESI数据减少和分析而开发的管道的性能。

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来源期刊

Astrophysical Journal 地学天文-天文与天体物理

CiteScore

8.40

自引率

30.60%

发文量

2854

审稿时长

1 months

期刊介绍： The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.

期刊最新文献

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