Assess the impact of redshift-evolving dark energy on the integrated Sachs-Wolfe signal

Determine how redshift-evolving dark energy affects the estimation and amplitude of the low-redshift integrated Sachs-Wolfe signal.

Background

The paper discusses reported excesses of the late-time integrated Sachs-Wolfe effect relative to the LambdaCDM prediction, including possible sign changes at very low redshift. It further notes evidence for redshift-evolving dark energy and identifies the unresolved issue of how such evolution would alter estimates of the integrated Sachs-Wolfe contribution and its amplitude.

References

It has to be seen how the discovery of redshift-evolving DE (see e.g. and ) could impact the estimation of the ISW signal and its amplitude at low redshift.

— The variance of the CMB temperature gradient: a dependence on the spatial orientation and anisotropy of a multiply connected Universe  (2610.12179 - Aurich et al., 8 Oct 2026) in Section 1, Introduction