Determination of cosmological parameters: an introduction for non-specialists

TL;DR

This paper introduces key cosmological parameters, explains how they influence the universe's age and evolution, and reviews recent measurement strategies and results, including implications for particle physics.

Contribution

It provides an accessible overview of how cosmological parameters are defined, measured, and interpreted, with recent observational results included.

Findings

Recent supernova measurements constrain cosmological parameters

The universe's age depends on $H_0$, $\

Implications for particle physics are briefly discussed.

Abstract

I start by defining the cosmological parameters $H_0, \Omega_m$ and $\Omega_\Lambda$. Then I show how the age of the universe depends on them, followed by the evolution of the scale parameter of the universe for various values of the density parameters. Then I define strategies for measuring them, and show the results for the recent determination of these parameters from measurements on supernovas of type 1a. Implications for particle physics is briefly discussed at the end.