2008/05/31 by Benjamin R. Granett, Mark C. Neyrinck, István Szapudi · 1 citation
Physics and Astronomy · #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1086/591670
published as Astrophys.J. 683 (2008) L99-L102 · 4 pages, 2 figures, accepted to ApJ Letters. Minor changes to match accepted version
arxiv created 2008/07/10 · arxiv updated 2009/12/01
We measure hot and cold spots on the microwave background associated with supercluster and supervoid structures identified in the Sloan Digital Sky Survey Luminous Red Galaxy catalog. The structures give a compelling visual imprint, with a mean temperature deviation of 9.6 +/- 2.2 microK, i.e. above 4 sigma. We interpret this as a detection of the late-time Integrated Sachs-Wolfe (ISW) effect, in which cosmic acceleration from dark energy causes gravitational potentials to decay, heating or cooling photons passing through density crests or troughs. In a flat universe, the linear ISW effect is a direct signal of dark energy.