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Were small galaxies once the dominant cosmological population? (1991)

Cowie, L. L. ; Hu, E. M. ; Songaila, A.

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Publication Date: 2011-08-24

Description: Redshifts and K magnitudes have been obtained for a small but complete sample of 22 galaxies with B magnitudes down to 24. In the luminosity range B = 23-24, the B-band galaxy counts are dominated by a population of small blue galaxies at z roughly 0.25, which may collectively contain as much baryonic matter as the normal galaxies. It is possible either that these earlier galaxies have undergone merging to create the present galaxy population, or that they represent a quite different galactic population which has now faded or disappeared. Either possibility has considerable implications for understanding of galaxy formation.

Keywords: ASTROPHYSICS

Type: Nature (ISSN 0028-0836); 354; 460

Format: text

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