Significant primordial star formation at redshifts z ≈ 3–4

Raul Jimenez () and Zoltan Haiman ()
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Raul Jimenez: University of Pennsylvania
Zoltan Haiman: Columbia University

Nature, 2006, vol. 440, issue 7083, 501-504

Abstract: Metal work Four recent anomalous results obtained during observation of high-redshift galaxies can be resolved at a stroke if a simple modification is made to the current models of galaxy formation. The modification is the assumption that 10–30% of the stars in many galaxies at redshifts of z = 3 to z = 4 are ‘primordial’. That is, they have not been enriched by metals — which to cosmologists means anything heavier than helium. Previously it had been assumed that micromixing of the heavier elements would have been extensive at the giga-year timescales implicit at these relatively low redshifts.

Date: 2006
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DOI: 10.1038/nature04580

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