A Catalog of 12,766 Carbon-enhanced Metal-poor Stars from LAMOST Data Release 8

Abstract

Metal-poor stars are a rare and ancient type of star; carbon-enhanced metal-poor (CEMP) stars are a subset of these celestial bodies that show an enrichment of carbon relative to iron. They are believed to be formed from gas polluted by the first generation of stars after the Big Bang and are important objects for studying the early Universe, galaxy evolution, and nucleosynthesis. Due to their rarity, the search for metal-poor stars and CEMP stars is a valuable task. This study investigates the search for CEMP stars based on the low-resolution stellar spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 8 (DR8), and proposes a deep learning scheme. From the LAMOST DR8 spectral library, this work discovered 12,766 CEMP star candidates. For ease of reference and use, we provide the estimated parameters T _eff , $\mathrm{log}\,g,$ [Fe/H], and [C/H] for them.

Keywords

• Astronomy data analysis
• CEMP stars
• Chemical abundances
• Catalogs