Galaxy groups and clusters and their brightest galaxies within the cosmic web

Open Access

Fig. 5.

Luminosity of groups vs global luminosity–density D8. The horizontal lines indicate the group luminosities , , and . The vertical lines show the global luminosity–density limits D8 = 1.15, D8 = 2.38, D8 = 5.0, and D8 = 7.0 (see text). Only one-quarter of all the groups, randomly chosen, are shown.

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