IReNA Workshop on the Astrophysical Origin of Carbon
The astrophysical origin of Carbon and its role in stellar evolution is one of the most exciting problems in nuclear and stellar astrophysics, and it was recently shown to play a key role in the interpretation of Gravitational wave data from mergers of binary black holes, via the dependence of the BH mass gap on the 12C(alpha,gamma)16O reaction. Measurements of carbon abundances are now possible in old stars of the Galactic disc and bulge, in extragalactic systems, such as damped Lya, Globular clusters, and the Carbon-Enhanced Metal-Poor (CEMP) halo populations, holding a strong potential for constraining nucleosynthesis in massive rapidly rotating hyper metal-poor stars, pollution in binary systems, and to constrain the pair instability supernovae associated with the mass gap. The main goal of this workshop is to (a) bring together observers and theoreticians working on the topic to test the predictions of stellar models and their capability to explain the diversity of C ratios on Galactic scales and at high-redshift, (b) develop new projects and collaborations to explore new approaches and techniques to the data to increase the accuracy of the measurements beyond LTE, (c) explore the role of multi-dimensionality in theoretical stellar modeling and develop a more easily accessible virtual framework to make the data and models easily accessible and interpretable by the community. Our focus will primarily be on high-redshift stellar populations in the Galaxy and in extragalactic systems, but we will also explore Galactic chemical enrichment across all time scales as probed by the stellar populations near and far.