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APS » Journals » Phys. Rev. Lett. » Volume 84 » Issue 16
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Phys. Rev. Lett. 84, 3523–3526 (2000)

Dark Energy and the Cosmic Microwave Background Radiation

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Scott Dodelson1 and Lloyd Knox2
1NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510
2Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637

Received 29 September 1999; published in the issue dated 17 April 2000

We find that current cosmic microwave background anisotropy data strongly constrain the mean spatial curvature of the Universe to be near zero, or, equivalently, the total energy density to be near critical—as predicted by inflation. This result is robust to editing of data sets, and variation of other cosmological parameters (totaling seven, including a cosmological constant). Other lines of argument indicate that the energy density of nonrelativistic matter is much less than critical. Together, these results are evidence, independent of supernovae data, for dark energy in the Universe.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.3523
DOI:
10.1103/PhysRevLett.84.3523
PACS:
98.70.Vc, 95.35.+d, 98.80.Es
 
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