Distant large scale structures

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Superclusters, Large-Scale Structure Of The Universe, Observational Cosmology

Scientific paper

The existence of massive virialized objects at high redshifts is not expected in most cosmologies. I discuss the evidence for the existence of massive clusters at z>0.9 and conclude that there is strong evidence that such objects exist at z~1.2. At larger redshifts the evidence is not conclusive. The number and mass of such objects is difficult to estimate at present because of their optical faintness and the limitations of present data x-ray telescopes.

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