Pre-galactic metal enrichment - The chemical signatures of the first stars

Abstract

The emergence of the first sources of light at redshifts of z ~ 10-30 signaled the transition from the simple initial state of the Universe to one of increasing complexity. We review recent progress in our understanding of the formation of the first stars and galaxies, starting with cosmological initial conditions, primordial gas cooling, and subsequent collapse and fragmentation. We emphasize the important open question of how the pristine gas was enriched with heavy chemical elements in the wake of the first supernovae. We conclude by discussing how the chemical abundance patterns conceivably allow us to probe the properties of the first stars and subsequent stellar generations, and allow us to test models of early metal enrichment.

52 pages, 20 figures, clarifications, references added, accepted for publication in the Reviews of Modern Physics

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• Constraining the Statistics of Population III Binaries
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• Chemical Signatures of the First Galaxies: Criteria for One-Shot Enrichment
• Gamma-ray Burst Cosmology
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• When did Population III star formation end?
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