CosmoCoffee

The authors claim that the cross-correlation between the CMB and large-scale structure is not statistically significant. Such a detection is usually interpreted as being due to the ISW effect, which is a prediction of dark energy models. (More generally, any cosmological models other than matter-dominated spatially flat FRW predict an ISW effect, though the quantitative details of course vary.)

The authors consider WMAP5 and SDSS DR7 data. They argue that the intrinsic field-to-field fluctuations are larger than the signal and that thus there is o significant detection. I don't quite follow the analysis, and would be grateful if more knowleadgle people would share their views.

I'd like to draw your attention to yet another paper where no significant detection of the Sachs-Wolfe effect is claimed, Francis & Peacock (2010) 0909.2494. They cross-correlated CMB with 2MASS. They say even that it might be that the S-W effect could remain undetected in a LambdaCDM universe, even if present!