Carbon stars in the Local Group
M.A.T. Groenewegen

TL;DR
This paper reviews the current knowledge of carbon stars in the Local Group, highlighting observational challenges, recent data integration efforts, and the relationship between carbon star formation, metallicity, and star formation history.
Contribution
It provides a comprehensive overview of the status of carbon star observations in the Local Group and introduces a method of correlating data with 2MASS to improve understanding.
Findings
Carbon star formation depends on metallicity and star formation history.
Lower metallicity systems tend to have more carbon stars.
Some low-metallicity galaxies show few AGB carbon stars, indicating limited recent star formation.
Abstract
The current status of carbon stars in the Local Group and beyond, is discussed. Although many carbon stars and late M-stars have been identified in Local Group galaxies, a coherent understanding in terms of the chemical evolution- and star formation history of a galaxy is still largely lacking. Although a few major new surveys have been carried out over the last three years, the observational data is still incomplete in many respects: 1) for some of the larger galaxies only a small fraction in area has been surveyed so far, 2) surveys have been conducted using different techniques, and some of the older surveys are incomplete in bolometric magnitude, 3) only for some galaxies is there information about the late M-star population, or it is sometimes unpublished even when the data is available, 4) not all galaxies in the Local Group have been surveyed, 5) especially for some of the older…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Galaxies: Formation, Evolution, Phenomena
