%0 Journal Article
%T A New Version of the Lambda-CDM Cosmological Model, with Extensions and New Calculations
%A Jan Helm
%J Journal of Modern Physics
%P 193-238
%@ 2153-120X
%D 2024
%I Scientific Research Publishing
%R 10.4236/jmp.2024.152011
%X This article gives a state-of-the-art description of the cosmological Lambda-CDM model and in addition, presents extensions of the model with new calculations of background and CMB functions. Chapters 1-4 describe the background part of the model, <em>i.e.</em> the evolution of scale factor and density according to the Friedmann equations, and its extension, which results in a correction of the Hubble parameter, in agreement with new measurements (Cepheids-SNIa and Red-Giants). Based on this improved background calculation presented in chapters 5-9 the perturbation part of the model, <em>i.e.</em> the evolution of perturbation and structure according to the perturbed Einstein equations and continuity-Euler equations, and the power spectrum of the cosmic microwave background (CMB) is calculated with a new own code.
%K Lambda-DCM
%K Friedmann Equations
%K CMB
%K Metric Perturbation
%K Hubble Parameter
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=131295