An Imprint of Super-Structures on the Microwave Background due to the Integrated Sachs-Wolfe Effect

Abstract

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.

4 pages, 2 figures, accepted to ApJ Letters. Minor changes to match accepted version

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Cited by in corpus (11)

• Looking the void in the eyes - the kSZ effect in LTB models
• The radial BAO scale and Cosmic Shear, a new observable for Inhomogeneous Cosmologies
• A Map of the Integrated Sachs-Wolfe Signal from Luminous Red Galaxies
• The High Redshift Integrated Sachs-Wolfe Effect
• Impact of Scale Dependent Bias and Nonlinear Structure Growth on the ISW Effect: Angular Power Spectra
• A new perspective on the relation between dark energy perturbations and the late-time ISW effect
• The Averaging Problem in Cosmology
• Flat Universe with Hyperbolic Voids
• Probing violation of the Copernican principle via the integrated Sachs-Wolfe effect
• Dynamical evolutin of quintessence dark energy in collapsing dark matter halos
• Impact of scale-dependent bias and nonlinear evolution on the ISW