Abstract
Context. The first generation of stars formed in the Galaxy left behind the chemical signatures of their nucleosynthesis in the interstellar medium, visible today in the atmospheres of low-mass stars that formed afterwards. Sampling the chemistry of those low-mass provides insight into the first stars.
Highlights
The fraction of stars with low metal content increases with magnitude (Robin et al 2003) and increases at high Galactic latitudes
In this work we report on faint candidates observed with the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy (OSIRIS) at Gran Telescopio de Canarias (GTC)
For this work we focus on promising candidates with low signal-to-noise ratio (S/N) spectra and, higher error bars in the parameter determination
Summary
Their study is key to understanding the early Galaxy. The fraction of stars with low metal content increases with magnitude (Robin et al 2003) and increases at high Galactic latitudes. The number of halo stars at [Fe/H] ∼ −4 is only a small percent of those at [Fe/H] ∼ −3, and those are only a small percent of those at [Fe/H] ∼ −2 (Allende Prieto et al 2016). About two dozen stars are known at [Fe/H] < −4 (Bonifacio et al 2015; Placco et al 2015; Aguado et al 2016) even though it is the most interesting regime on the yields from the very first generation of stars. Developing new procedures to identify faint metal-poor stars is an important task
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
