Carbon-enhanced metal-poor stars in different environments

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.

4 pages, 4 figures. To appear in Astronomische Nachrichten, special issue "Reconstructing the Milky Way's History: Spectroscopic Surveys, Asteroseismology and Chemodynamical Models", Guest Editors C. Chiappini, J. Montalban, and M. Steffen, AN 2016 (in press)

References in corpus (7)

• The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization Era
• Carbon-Enhanced Metal-Poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
• The stellar halo of the Galaxy
• Ultra faint dwarfs: probing early cosmic star formation
• Carbon-enhanced metal-poor stars in dwarf galaxies
• Decoding the stellar fossils of the dusty Milky Way progenitors
• The first carbon-enhanced metal-poor star found in the Sculptor dwarf spheroidal

Cited by in corpus (4)

• Limits on Pop III star formation with the most iron-poor stars
• Galactic Archeology with the AEGIS Survey: The Evolution of Carbon and Iron in the Galactic Halo
• Chemical Cartography. II. The Assembly History of the Galactic Stellar Halo Traced by Carbon-Enhanced Metal-Poor Stars
• Chemo-Dynamically Tagged Groups of CEMP Stars in the Halo of the Milky Way. I. Untangling the Origins of CEMP-$s$ and CEMP-no Stars