The Physical Properties of the Cosmic Acceleration

TL;DR

This paper reviews recent observational data to evaluate various dark energy models explaining the universe's late-time acceleration, aiming to constrain their validity through multiple cosmological measurements.

Contribution

It provides a comprehensive analysis of observational constraints on dark energy models using recent cosmological data sets.

Findings

Certain dark energy models are strongly constrained or ruled out.

Observational data favors specific parameter ranges for dark energy.

The study enhances understanding of the universe's accelerated expansion.

Abstract

The observed late-time acceleration of the cosmic expansion constitutes a fundamental problem in modern theoretical physics and cosmology. In an attempt to weight the validity of a large number of dark energy models, I use the recent measurements of the expansion rate of the Universe, the clustering of galaxies the CMB fluctuations as well as the large scale structure formation, to put tight constraints on the different models.