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26 April 2024 |
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Revisiting The First Galaxies: The epoch of Population III stars | | Alexander L. Muratov
; Oleg Y. Gnedin
; Nickolay Y. Gnedin
; Marcel Zemp
; | | Date: |
5 Dec 2012 | | Abstract: | We investigate the transition from primordial Pop III star formation to
normal Pop II star formation in the first galaxies using new cosmological
hydrodynamic simulations. We find that while the first stars seed their host
galaxies with metals, they cannot sustain significant outflows to enrich the
intergalactic medium, even assuming a top-heavy initial mass function. This
means that Pop III star formation could potentially continue until z~6 in
different unenriched regions of the universe, before being ultimately shut off
by cosmic reionization. Within an individual galaxy, Pop II stars overtake Pop
III stars in 20-200 Myr, based on the amount of stellar feedback and metal
production. | | Source: | arXiv, 1212.1157 | | Services: | Forum | Review | PDF | Favorites | |
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