Temperature Anisotropy of the CMBR and the Non-zero Cosmological Constant

TL;DR

This paper investigates how a spherical mass concentration influences the temperature anisotropy of the cosmic microwave background in a universe with a non-zero cosmological constant, showing it reduces the Rees-Sciama effect.

Contribution

It demonstrates that a spherically symmetric clump diminishes the Rees-Sciama effect in a cosmological model with a non-zero cosmological constant.

Findings

Spherical clumps weaken the Rees-Sciama effect

Non-zero cosmological constant impacts anisotropy analysis

Results align with standard cosmological model predictions

Abstract

We analyze the effect of a spherically symmetric clump on the anisotropy of the cosmic microwave background radiation temperature in the framework of the standard model of cosmology with a non-zero cosmological constant $\Lambda$ and we show that it weakens the Rees-Sciama effect.