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A New Version of the Lambda-CDM Cosmological Model, with Extensions and New Calculations

A New Version of the Lambda-CDM Cosmological Model, with Extensions and New Calculations
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摘要 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, i.e. 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, i.e. 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. 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, i.e. 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, i.e. 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.
作者 Jan Helm Jan Helm(Department of Electrical Engineering, Technical University Berlin, Berlin, Germany)
出处 《Journal of Modern Physics》 2024年第2期193-238,共46页 现代物理(英文)
关键词 Lambda-DCM Friedmann Equations CMB Metric Perturbation Hubble Parameter Lambda-DCM Friedmann Equations CMB Metric Perturbation Hubble Parameter
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