Anisotropies In The Cosmic Microwave Background: A Two Fluid Approximation

Puicercus, Alfonso (2022) Anisotropies In The Cosmic Microwave Background: A Two Fluid Approximation. Bachelor's Thesis, Physics.

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Abstract

This thesis introduces a conceptually simple method for the calculation of the anisotropy power spectrum of the cosmic microwave background using a two-fluid approximation. Evaluating the set of coupled fluid equations at recombination for both small and large scales regimes and free-streaming the solutions until today gives the CMB anisotropies. The model successfully reproduces the physical processes involved in the creation of these fluctuations to great accuracy, therefore making it a suitable approach for a better understanding of the physics behind the temperature anisotropies. Moreover, the toy model being considered is sensitive to a high degree to most of the critical parameters usually considered in different cosmological models, which can be used to comprehend the behaviour of the peaks. The code was developed in Python and is simple enough to be modified easily, both for the variation of the cosmological parameters and the possible implementation of more precise effects or approximations.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Roest, D. and Meerburg, P.D. and Wild, T.W.J. de
Degree programme:	Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	11 Jul 2022 10:27
Last Modified:	11 Jul 2022 10:27
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/27719

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