Anthropic bound on the cosmological constant
Journal Article
·
· Phys. Rev. Lett.; (United States)
In recent cosmological models, there is an ''anthropic'' upper bound on the cosmological constant ..lambda... It is argued here that in universes that do not recollapse, the only such bound on ..lambda.. 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, we may conclude that anthropic considerations do not explain the smallness of the cosmological constant.
- Research Organization:
- Theory Group, Department of Physics, University of Texas, Austin, Texas 78712
- OSTI ID:
- 5716119
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 59:22; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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