Population III stars constitute a theoretical research area focused on the first generation of metal-free (zero-metallicity) stars formed from primordial Big Bang nucleosynthesis products (hydrogen, helium, trace lithium). This field investigates their initial mass function, formation channels in minihalos, radiative and mechanical feedback, nucleosynthetic yields, and role in early cosmic reionization and chemical enrichment of the interstellar and intergalactic medium. Research integrates high-resolution cosmological simulations, stellar evolution and explosion models, and indirect observational constraints (e.g., from extremely metal-poor stars, high-redshift galaxies, and gamma-ray bursts) to constrain their properties and impact on early structure formation and cosmology.
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