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
4
Refereed citations
3
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
Stellar & Interstellar Physics (FEEI)
Spectroscopy
Milky Way formation

It may interest you

  • Refereed
    Characterisation at Cryogenic Temperatures of an Attenuator for an Application of Astrophysical Instrumentation with MKIDs
    The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically
    Rodríguez Ramos L.F. et al.

    Advertised on:

    12
    2024
  • Refereed
    The return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are limited to strongly active regions because signal-to-noise ratio of the data is low. Recently, we developed the FarNet and FarNet-II neural networks to improve the identification of active
    Broock, E. G. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.182B
    Citations
    0
  • Refereed
    Non-local thermodynamic equilibrium inversions of the Si I 10827 Å spectral line
    Inferring the coupling of different atmospheric layers requires observing spectral lines sensitive to the atmospheric parameters, particularly the magnetic field vector, at various heights. The best way to tackle this goal is to perform multi-line observations simultaneously. For instance, the new version of the Gregor Infrared Spectrograph
    Quintero Noda, C. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.169Q
    Citations
    0