The integrated Sachs–Wolfe effect in 4D Einstein–Gauss–Bonnet gravity

A novel 4-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity has been proposed that asserts to bypass the Lovelock's theorem and result in a non-trivial contribution gravitational dynamics four-dimensional spacetime. In this work, we study integrated Sachs-Wolfe (ISW) effect 4D EGB model. For purpose, calculate evolution of potential linear growth factor as function redshift for model compare it with corresponding obtained from $\Lambda$-cold dark matter ($\Lambda$CDM) We also ISW-auto power spectrum ISW-cross functions cosmic microwave background (CMB) multipoles those one $\Lambda$CDM To do this, use strongest constraint on coupling parameter Additionally, ISW model, employ three large-scale structure surveys different wavelengths. The results exhibit is higher than Hence, show can amplify amplitude spectrum, which be considered relative advantage comparing one. Also, indicate deviation directly proportional value dimensionless $\beta$.