Explaining the high nitrogen abundances observed in high-z galaxies via population III stars of a few thousand solar masses

• DOI: 10.48550/arxiv.2402.03428
• Publication Date: 2024-02-05
• Authors: Devesh Nandal; John A. Regan; Tyrone E. Woods; Eoin Farrell; Sylvia Ekström; G. Meynet

The chemical enrichment of the early Universe is a crucial element in formation and evolution galaxies, Population III (PopIII) stars must play vital role this process. In study, we examine metal from massive Universe's embryonic galaxies. Using radiation hydrodynamic simulations stellar modelling, calculated expected yield these stars. Specifically, applied accretion rates previous radiation-hydrodynamic simulation to inform our executed with Geneva code, across 11 selected datasets, final masses between 500 9000 Msol. Our results demonstrate that first generation Pop within mass range 2000 Msol result N/O, C/O O/H ratios compatible values observed very high-z galaxies GN-z11 CEERS 1019. ejecta are predominantly composed He, H, N. model halo can accurately reproduce N/O ratios, and, by incorporating hundred times more zero-metallicity interstellar material ejecta, it attains ratio. Thus, sub-population extremely PopIII stars, surpassing approximately Msol, effectively reproduces CNO elemental abundances JWST date.