protogroups
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English
[edit]Noun
[edit]protogroups
- plural of protogroup
- 2015, P. Medvedev, S. Sazonov, M. Gilfanov, “Helium diffusion during formation of the first galaxies”, in arXiv[1]:
- Even stronger abundance enhancements, ~ a few , may arise at much later, post-reionization epochs, z ~ 2, in protogroups of galaxies () as a result of accretion of warm-hot intergalactic medium with T ~ 10^6 K.