Friday, July 15, 2011

Dark-energy fingerprints found in ancient radiation - physics-math - 15 July 2011 - New Scientist

Dark-energy fingerprints found in ancient radiation: ...the accelerating expansion of the universe should prevent the growth of very massive structures. "In a universe with no dark energy, massive objects would just keep growing, which results in more gravitational lensing," says Sudeep Das of the University of California, Berkeley.

Gravitational lensing is tough to pick out in the ancient radiation because the CMB contains random fluctuations. But Das and his colleagues have used a new type of mathematical analysis to reveal for the first time the distinctive distortions from gravitational lensing in the CMB.

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