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

By Benjamin R. Granett, Mark Neyrinck, Istvan Szapudi. 2008

237 citations recorded by the source corpus.

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 μK, i.e., above 4 σ. 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.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/38fe5af6f9eb8717ac5964e0d45e4676045e9ef8

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In Astronomy and Astrophysics

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Citations in the corpus

• Testing gravity using cosmic voids (2014, methodology): “…background has been used as an alternative to the cross-correlation method to detect the intgrated Sachs-Wolfe effect (Cai et al. 2014, 2013; Granett et al. 2008; Hotchkiss et al. 2014; Ilić et al. 2013; Planck Collaboration et al. 2013); the weak gravitational lensing effect of voids, as…”
• Evidence of the accelerated expansion of the Universe from weak lensing tomography with COSMOS (2009, background): “…(Allen et al. 2008; Mantz et al. 2008, 2009; Vikhlinin et al. 2009), baryon acoustic oscillations (Eisenstein et al. 2005; Percival et al. 2007, 2009), integrated Sachs-Wolfe eff ct (Giannantonio et al. 2008; Granett et al. 2008; Ho et al. 2008), and strong gravitational lensing (Suyu et al. 2009).”
• EMU: Evolutionary Map of the Universe (2011, methodology): “Cross-correlation of low-redshift galaxies with highredshift galaxies, or the CMB, to test cosmology and fundamental physics as discussed in y2.”