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The Cosmic Microwave Background and Observational Convergence in the ΩmΛ Plane

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Charles H. Lineweaver1

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I use the most recent cosmic microwave background (CMB) anisotropy measurements to constrain the leading cold dark matter models in the ΩmΛ plane. A narrow triangular region is preferred. This triangle is elongated in such a way that its intersection with even conservative versions of recent supernovae, cluster mass-to-light ratios, and double radio source constraints is small and provides the current best limits in the ΩmΛ plane: ΩΛ=0.62 ± 0.16 and Ωm=0.24 ± 0.10. This complementarity between the CMB and other observations rules out ΩΛ=0 models at more than the 99% confidence level.


Subject headings

cosmic microwave background; cosmology: observations


Dates

Issue 2 (1998 October 1)

Received 1998 May 27, accepted for publication 1998 August 6

Published 1998 August 27



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