Scalar field dark energy perturbations and the Integrated Sachs Wolfe effect

Understand

Dark energy perturbation affects the growth of matter perturbations even in scenarios with noninteracting dark energy.

• We investigate the Integrated Sachs Wolfe (ISW) effect in various canonical scalar field models with perturbed dark energy.
• We do this analysis for models belonging to the thawing and freezing classes.
• We show that between these classes there is no clear difference for the ISW effect.