Evidence of dark energy in different cosmological observations

TL;DR

This paper reviews multiple cosmological observations, including supernovae, CMB, and galaxy surveys, providing evidence for dark energy and discussing tensions in parameter measurements like H0 and sigma8.

Contribution

It offers a comprehensive survey of observational evidence for dark energy and examines the potential of varying dark energy models to resolve observational tensions.

Findings

Consistent evidence for dark energy from supernovae, CMB, and galaxy surveys.

Identification of discrepancies in H0 and sigma8 measurements.

Discussion on the viability of varying dark energy models to address tensions.

Abstract

The idea of a negative-pressure dark energy component in the Universe which causes an accelerated expansion in the late Universe has deep implications in models of field theory and general relativity. In this article, we survey the evidence for dark energy from cosmological observations which started from the compilation of distance-luminosity plots of Type Ia supernovae. This turned out to be consistent with the dark energy inferred from the CMB observations and large scale surveys and gave rise to the concordance $\Lambda$CDM model of cosmology. In this article, we discuss the observational evidence for dark energy from Type Ia supernovae, CMB, galaxy surveys, observations of the Sunyaev-Zeldovich effect from clusters, and lensing by clusters. We also discuss the observational discrepancy in the values of $H_0$ and $\sigma_8$ between CMB and large scale structures and discuss if varying dark energy models are able to resolve these tensions between different observations.