Anthropic bound on the cosmological constant

Details Anthropic bound on the cosmological constant Anthropic bound on the cosmological constant

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..59.2607w&link_type=abstract

Physical Review Letters, Volume 59, Issue 22, November 30, 1987, pp.2607-2610

Mathematics

Logic

433

Fundamental Problems And General Formalism

Scientific paper

In recent cosmological models, there is an "anthropic" upper bound on the cosmological constant Λ. It is argued here that in universes that do not recollapse, the only such bound on Λ is that it should not be so large as to prevent the formation of gravitationally bound states. It turns out that the bound is quite large. A cosmological constant that is within 1 or 2 orders of magnitude of its upper bound would help with the missing-mass and age problems, but may be ruled out by galaxy number counts. If so, one may conclude that anthropic considerations do not explain the smallness of the cosmological constant.

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