Carbon-enhanced metal-poor stars in different environments
Stefania Salvadori, Asa Skuladottir, and Matteo de Bennassuti
TL;DR
This paper reviews the properties and origins of carbon-enhanced metal-poor stars across various environments, linking observations to models of early stellar populations and galaxy formation.
Contribution
It provides a comparative analysis of CEMP stars in different environments and discusses their implications for understanding the first stars and galaxy evolution.
Findings
CEMP star fractions vary with galaxy luminosity
First CEMP-no star identified in Sculptor dwarf galaxy
Observations support models of early chemical enrichment
Abstract
The origin of carbon-enhanced metal-poor (CEMP) stars and their possible connections with the chemical elements produced by the first stellar generations is still highly debated. We briefly review observations of CEMP stars in different environments (Galactic stellar halo, ultra-faint and classical dwarf galaxies) and interpret their properties using cosmological chemical-evolution models for the formation of the Local Group. We discuss the implications of current observations for the properties of the first stars, clarify why the fraction of carbon-enhanced to carbon-normal stars varies in dwarf galaxies with different luminosity, and discuss the origin of the first CEMP(-no) star found in the Sculptor dwarf galaxy.
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