Determination of cosmological parameters: An
introduction for non-specialists

PALASH B PAL

Saha Institute of Nuclear Physics, 1/AF Bidhan-Nagar, Calcutta 700 064, India

Abstract

I start by defining the cosmological parameters H₀, W_m and W_L. 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.

KeywordsHubble expansion; cosmological constant; supernova.

PACS No. 3.50 Kk; 04.20 Cv; 04.40 Dy

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