Key points are not available for this paper at this time.
A crucial diagnostic of the CDM cosmological model is the integrated Sachs-Wolfe (ISW) effect of large-scale structure on the cosmic microwave background (CMB). The ISW imprint of superstructures of size 100\;h^-1 Mpc at redshift z0. 5 has been detected with >4 significance, however it has been noted that the signal is much larger than expected. We revisit the calculation using linear theory predictions in CDM cosmology for the number density of superstructures and their radial density profile, and take possible selection effects into account. While our expected signal is larger than previous estimates, it is still inconsistent by >3 with the observation. If the observed signal is indeed due to the ISW effect then huge, extremely underdense voids are far more common in the observed universe than predicted by CDM.
Nadathur et al. (2012) studied this question.