Nucleosynthesis of the first stellar generations

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• Georges Meynet (Geneva)
• Thursday 13 June 2024, 16:00-17:00
• Hoyle Lecture Theatre, Institute of Astronomy.

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The first stellar generations in the Universe were sources of ionizing radiation and of newly synthesized elements. They played a key role in the reionization process as well as initiating the chemical evolution of the Universe. The talk will begin recalling the expected main physical properties of the first stellar generations that likely make them to evolve significantly differently from stars in the present-day Universe. We will then focus on aspects dealing with the chemical enrichments by the first stellar generations. Comparisons between predictions of models with the observed surface composition of halo stars will be presented. The special case of the Carbon-Enhanced Metal poor stars (CEMP), especially the most iron-poor ones, provide very precious and interesting clues about the very early chemical enrichment processes. The talk will end by discussing the extremely interesting cases of nitrogen-rich regions in high redshift galaxies.

This talk is part of the Institute of Astronomy Colloquia series.

This talk is included in these lists:

• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Hoyle Lecture Theatre, Institute of Astronomy
• Institute of Astronomy Colloquia
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla

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