Abstract
The expulsion of metal-rich grains from collapsing protostars is considered, and it is concluded that stars of mass greater than 21M ⊙ could be significantly depleted in heavy metals during their formation.
References
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Edmunds, M.G., Wickramasinghe, N.C. On the formation of metal-poor stars. Astrophys Space Sci 30, L9–L15 (1974). https://doi.org/10.1007/BF00645771
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DOI: https://doi.org/10.1007/BF00645771