Introduction

The Integrated Sachs-Wolfe (ISW) effect is due to the decays of graviational potential wells.  It can be split into two parts: the early ISW and the late-time ISW effects.   This page focusses on the latter.

While the early ISW effect occurs shortly after fecombination during the radiation era, the late-time ISW effect occurs much later, and is due to the gravitational potentials of Large Scale Structure (LSS).  It can also be a result of the potential of Dark Energy if one considers it is a fluid with perturbations.

The Origin of the late-time ISW effect

Cross-Correlation of Galaxy and Temperature Anisotropy Fields

Linear Theory Prediction for ISW

Redshift Evolution of the ISW Signal

Cosmological Parameter Dependence of the ISW Signal

Galaxy Bias

Dark Energy vs. Curvature

Lambda vs. Dark Energy